51100401804 has 12 divisors (see below), whose sum is σ = 119234270904. Its totient is φ = 17033467264.

The previous prime is 51100401763. The next prime is 51100401841. The reversal of 51100401804 is 40810400115.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×51100401804² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129183397 + ... + 2129183420.

It is an arithmetic number, because the mean of its divisors is an integer number (9936189242).

Almost surely, 2^51100401804 is an apocalyptic number.

It is an amenable number.

51100401804 is an abundant number, since it is smaller than the sum of its proper divisors (68133869100).

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

51100401804 is a wasteful number, since it uses less digits than its factorization.

51100401804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258366824 (or 4258366822 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 51100401804 its reverse (40810400115), we get a palindrome (91910801919).

The spelling of 51100401804 in words is "fifty-one billion, one hundred million, four hundred one thousand, eight hundred four".