651225312 has 96 divisors (see below), whose sum is σ = 1982050560. Its totient is φ = 207630720.

The previous prime is 651225301. The next prime is 651225317. The reversal of 651225312 is 213522156.

It is a happy number.

651225312 is a `hidden beast` number, since 6 + 5 + 122 + 531 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651225317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3487 + ... + 36257.

It is an arithmetic number, because the mean of its divisors is an integer number (20646360).

Almost surely, 2^651225312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651225312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991025280).

651225312 is an abundant number, since it is smaller than the sum of its proper divisors (1330825248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651225312 is a wasteful number, since it uses less digits than its factorization.

651225312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32813 (or 32799 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 651225312 is about 25519.1165991302. The cubic root of 651225312 is about 866.7830781169.

Adding to 651225312 its reverse (213522156), we get a palindrome (864747468).

The spelling of 651225312 in words is "six hundred fifty-one million, two hundred twenty-five thousand, three hundred twelve".