51264895 has 16 divisors (see below), whose sum is σ = 69426720. Its totient is φ = 35996800.

The previous prime is 51264887. The next prime is 51264919. The reversal of 51264895 is 59846215.

It is not a de Polignac number, because 51264895 - 2³ = 51264887 is a prime.

It is a super-2 number, since 2×51264895² = 5256178918722050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14476 + ... + 17665.

It is an arithmetic number, because the mean of its divisors is an integer number (4339170).

Almost surely, 2^51264895 is an apocalyptic number.

51264895 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51264895 is a deficient number, since it is larger than the sum of its proper divisors (18161825).

51264895 is a wasteful number, since it uses less digits than its factorization.

51264895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32186.

The product of its digits is 86400, while the sum is 40.

The square root of 51264895 is about 7159.9507679872. The cubic root of 51264895 is about 371.4839237386.

The spelling of 51264895 in words is "fifty-one million, two hundred sixty-four thousand, eight hundred ninety-five".