51810057 has 16 divisors (see below), whose sum is σ = 82660480. Its totient is φ = 31882896.

The previous prime is 51810047. The next prime is 51810119. The reversal of 51810057 is 75001815.

It is not a de Polignac number, because 51810057 - 2⁴ = 51810041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51810057.

It is not an unprimeable number, because it can be changed into a prime (51810047) 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, 73453 + ... + 74154.

It is an arithmetic number, because the mean of its divisors is an integer number (5166280).

Almost surely, 2^51810057 is an apocalyptic number.

It is an amenable number.

51810057 is a deficient number, since it is larger than the sum of its proper divisors (30850423).

51810057 is a wasteful number, since it uses less digits than its factorization.

51810057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147629 (or 147623 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 51810057 is about 7197.9203246493. The cubic root of 51810057 is about 372.7960968703.

The spelling of 51810057 in words is "fifty-one million, eight hundred ten thousand, fifty-seven".