51011265120 has 96 divisors (see below), whose sum is σ = 160716739680. Its totient is φ = 13600358400.

The previous prime is 51011265119. The next prime is 51011265121. The reversal of 51011265120 is 2156211015.

It is an interprime number because it is at equal distance from previous prime (51011265119) and next prime (51011265121).

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×51011265120² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011265121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4602946 + ... + 4614014.

It is an arithmetic number, because the mean of its divisors is an integer number (1674132705).

Almost surely, 2^51011265120 is an apocalyptic number.

It is an amenable number.

51011265120 is an abundant number, since it is smaller than the sum of its proper divisors (109705474560).

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

51011265120 is a wasteful number, since it uses less digits than its factorization.

51011265120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20688 (or 20680 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 51011265120 its reverse (2156211015), we get a palindrome (53167476135).

The spelling of 51011265120 in words is "fifty-one billion, eleven million, two hundred sixty-five thousand, one hundred twenty".