51495619 has 32 divisors (see below), whose sum is σ = 64512000. Its totient is φ = 40995360.

The previous prime is 51495611. The next prime is 51495637. The reversal of 51495619 is 91659415.

It is not a de Polignac number, because 51495619 - 2³ = 51495611 is a prime.

It is a super-2 number, since 2×51495619² = 5303597552386322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51495611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308274 + ... + 308440.

It is an arithmetic number, because the mean of its divisors is an integer number (2016000).

Almost surely, 2^51495619 is an apocalyptic number.

51495619 is a deficient number, since it is larger than the sum of its proper divisors (13016381).

51495619 is a wasteful number, since it uses less digits than its factorization.

51495619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 234 counting only the distinct ones).

The product of its digits is 48600, while the sum is 40.

The square root of 51495619 is about 7176.0448019783. The cubic root of 51495619 is about 372.0403928660.

The spelling of 51495619 in words is "fifty-one million, four hundred ninety-five thousand, six hundred nineteen".