651213012 has 24 divisors (see below), whose sum is σ = 1551828096. Its totient is φ = 212452288.

The previous prime is 651212981. The next prime is 651213047. The reversal of 651213012 is 210312156.

It is a super-2 number, since 2×651213012² = 848156773996224288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 651213012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576753 + ... + 577880.

It is an arithmetic number, because the mean of its divisors is an integer number (64659504).

Almost surely, 2^651213012 is an apocalyptic number.

It is an amenable number.

651213012 is an abundant number, since it is smaller than the sum of its proper divisors (900615084).

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

651213012 is a wasteful number, since it uses less digits than its factorization.

651213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154687 (or 1154685 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 651213012 is about 25518.8756021891. The cubic root of 651213012 is about 866.7776209688. Note that the first 3 decimals are identical.

Adding to 651213012 its reverse (210312156), we get a palindrome (861525168).

The spelling of 651213012 in words is "six hundred fifty-one million, two hundred thirteen thousand, twelve".