651022172 has 12 divisors (see below), whose sum is σ = 1139505696. Its totient is φ = 325449120.

The previous prime is 651022171. The next prime is 651022187. The reversal of 651022172 is 271220156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651022171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14672 + ... + 38952.

It is an arithmetic number, because the mean of its divisors is an integer number (94958808).

Almost surely, 2^651022172 is an apocalyptic number.

It is an amenable number.

651022172 is a deficient number, since it is larger than the sum of its proper divisors (488483524).

651022172 is a wasteful number, since it uses less digits than its factorization.

651022172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30988 (or 30986 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 651022172 is about 25515.1361352433. The cubic root of 651022172 is about 866.6929420699.

It can be divided in two parts, 6510 and 22172, that added together give a palindrome (28682).

The spelling of 651022172 in words is "six hundred fifty-one million, twenty-two thousand, one hundred seventy-two".