51015513211 has 8 divisors (see below), whose sum is σ = 55070287664. Its totient is φ = 46979382240.

The previous prime is 51015513203. The next prime is 51015513217. The reversal of 51015513211 is 11231551015.

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

It is a cyclic number.

It is not a de Polignac number, because 51015513211 - 2³ = 51015513203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51015513217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4655181 + ... + 4666126.

It is an arithmetic number, because the mean of its divisors is an integer number (6883785958).

Almost surely, 2^51015513211 is an apocalyptic number.

51015513211 is a deficient number, since it is larger than the sum of its proper divisors (4054774453).

51015513211 is a wasteful number, since it uses less digits than its factorization.

51015513211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9321741.

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 51015513211 in words is "fifty-one billion, fifteen million, five hundred thirteen thousand, two hundred eleven".