51869657 has 8 divisors (see below), whose sum is σ = 59707200. Its totient is φ = 44139024.

The previous prime is 51869651. The next prime is 51869681. The reversal of 51869657 is 75696815.

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 51869657 - 2⁶ = 51869593 is a prime.

It is a super-2 number, since 2×51869657² = 5380922634595298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51869651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25682 + ... + 27627.

It is an arithmetic number, because the mean of its divisors is an integer number (7463400).

Almost surely, 2^51869657 is an apocalyptic number.

It is an amenable number.

51869657 is a deficient number, since it is larger than the sum of its proper divisors (7837543).

51869657 is a wasteful number, since it uses less digits than its factorization.

51869657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53455.

The product of its digits is 453600, while the sum is 47.

The square root of 51869657 is about 7202.0592194177. The cubic root of 51869657 is about 372.9389914762.

The spelling of 51869657 in words is "fifty-one million, eight hundred sixty-nine thousand, six hundred fifty-seven".