651381822 has 96 divisors (see below), whose sum is σ = 1742587392. Its totient is φ = 171243072.

The previous prime is 651381803. The next prime is 651381823. The reversal of 651381822 is 228183156.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651381823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 895623 + ... + 896349.

It is an arithmetic number, because the mean of its divisors is an integer number (18151952).

Almost surely, 2^651381822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651381822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871293696).

651381822 is an abundant number, since it is smaller than the sum of its proper divisors (1091205570).

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

651381822 is a wasteful number, since it uses less digits than its factorization.

651381822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1299 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 651381822 is about 25522.1829395528. The cubic root of 651381822 is about 866.8525110002.

The spelling of 651381822 in words is "six hundred fifty-one million, three hundred eighty-one thousand, eight hundred twenty-two".