651013881 has 16 divisors (see below), whose sum is σ = 992621568. Its totient is φ = 371782800.

The previous prime is 651013877. The next prime is 651013901. The reversal of 651013881 is 188310156.

It is not a de Polignac number, because 651013881 - 2² = 651013877 is a prime.

It is a super-2 number, since 2×651013881² = 847638146509364322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (651013841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29986 + ... + 46916.

It is an arithmetic number, because the mean of its divisors is an integer number (62038848).

Almost surely, 2^651013881 is an apocalyptic number.

It is an amenable number.

651013881 is a deficient number, since it is larger than the sum of its proper divisors (341607687).

651013881 is a wasteful number, since it uses less digits than its factorization.

651013881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18772.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 651013881 is about 25514.9736625378. The cubic root of 651013881 is about 866.6892628395.

The spelling of 651013881 in words is "six hundred fifty-one million, thirteen thousand, eight hundred eighty-one".