651222156 has 24 divisors (see below), whose sum is σ = 1636404784. Its totient is φ = 200376000.

The previous prime is 651222149. The next prime is 651222157.

651222156 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (651222157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2087095 + ... + 2087406.

Almost surely, 2^651222156 is an apocalyptic number.

It is an amenable number.

651222156 is an abundant number, since it is smaller than the sum of its proper divisors (985182628).

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

651222156 is a wasteful number, since it uses less digits than its factorization.

651222156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174521 (or 4174519 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 651222156 is about 25519.0547630589. The cubic root of 651222156 is about 866.7816778991.

It can be divided in two parts, 65 and 1222156, that added together give a palindrome (1222221).

The spelling of 651222156 in words is "six hundred fifty-one million, two hundred twenty-two thousand, one hundred fifty-six".