51615500105 has 8 divisors (see below), whose sum is σ = 66703107912. Its totient is φ = 38116061568.

The previous prime is 51615500059. The next prime is 51615500137. The reversal of 51615500105 is 50100551615.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3491864464 + 48123635641 = 59092^2 + 219371^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51615500105 - 2⁸ = 51615499849 is a prime.

It is a super-2 number, since 2×51615500105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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, 397042244 + ... + 397042373.

It is an arithmetic number, because the mean of its divisors is an integer number (8337888489).

Almost surely, 2^51615500105 is an apocalyptic number.

It is an amenable number.

51615500105 is a deficient number, since it is larger than the sum of its proper divisors (15087607807).

51615500105 is a wasteful number, since it uses less digits than its factorization.

51615500105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794084635.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 51615500105 in words is "fifty-one billion, six hundred fifteen million, five hundred thousand, one hundred five".