51541521145 has 32 divisors (see below), whose sum is σ = 68262127488. Its totient is φ = 37195158528.

The previous prime is 51541521091. The next prime is 51541521173. The reversal of 51541521145 is 54112514515.

It is a cyclic number.

It is not a de Polignac number, because 51541521145 - 2³⁵ = 17181782777 is a prime.

It is a super-2 number, since 2×51541521145² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51541521145.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88414 + ... + 333016.

It is an arithmetic number, because the mean of its divisors is an integer number (2133191484).

Almost surely, 2^51541521145 is an apocalyptic number.

It is an amenable number.

51541521145 is a deficient number, since it is larger than the sum of its proper divisors (16720606343).

51541521145 is a wasteful number, since it uses less digits than its factorization.

51541521145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244729.

The product of its digits is 20000, while the sum is 34.

The spelling of 51541521145 in words is "fifty-one billion, five hundred forty-one million, five hundred twenty-one thousand, one hundred forty-five".