51136415 has 12 divisors (see below), whose sum is σ = 67450152. Its totient is φ = 37189680.

The previous prime is 51136409. The next prime is 51136447. The reversal of 51136415 is 51463115.

It is a de Polignac number, because none of the positive numbers 2^k-51136415 is a prime.

It is a super-2 number, since 2×51136415² = 5229865878104450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41657 + ... + 42866.

It is an arithmetic number, because the mean of its divisors is an integer number (5620846).

Almost surely, 2^51136415 is an apocalyptic number.

51136415 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51136415 is a deficient number, since it is larger than the sum of its proper divisors (16313737).

51136415 is a wasteful number, since it uses less digits than its factorization.

51136415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84550 (or 84539 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 51136415 is about 7150.9730107168. The cubic root of 51136415 is about 371.1733266442.

The spelling of 51136415 in words is "fifty-one million, one hundred thirty-six thousand, four hundred fifteen".