51495985 has 8 divisors (see below), whose sum is σ = 65047680. Its totient is φ = 39028464.

The previous prime is 51495949. The next prime is 51496001. The reversal of 51495985 is 58959415.

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 51495985 - 2⁹ = 51495473 is a prime.

It is a super-2 number, since 2×51495985² = 5303672942240450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270937 + ... + 271126.

It is an arithmetic number, because the mean of its divisors is an integer number (8130960).

Almost surely, 2^51495985 is an apocalyptic number.

It is an amenable number.

51495985 is a deficient number, since it is larger than the sum of its proper divisors (13551695).

51495985 is a wasteful number, since it uses less digits than its factorization.

51495985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542087.

The product of its digits is 324000, while the sum is 46.

The square root of 51495985 is about 7176.0703034460. The cubic root of 51495985 is about 372.0412742773.

The spelling of 51495985 in words is "fifty-one million, four hundred ninety-five thousand, nine hundred eighty-five".