51650557 has 24 divisors (see below), whose sum is σ = 63767040. Its totient is φ = 41640480.

The previous prime is 51650551. The next prime is 51650561. The reversal of 51650557 is 75505615.

It is a de Polignac number, because none of the positive numbers 2^k-51650557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51650551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55744 + ... + 56662.

It is an arithmetic number, because the mean of its divisors is an integer number (2656960).

Almost surely, 2^51650557 is an apocalyptic number.

It is an amenable number.

51650557 is a deficient number, since it is larger than the sum of its proper divisors (12116483).

51650557 is a wasteful number, since it uses less digits than its factorization.

51650557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 51650557 is about 7186.8321950634. The cubic root of 51650557 is about 372.4131461242.

The spelling of 51650557 in words is "fifty-one million, six hundred fifty thousand, five hundred fifty-seven".