51424065 has 160 divisors (see below), whose sum is σ = 122943744. Its totient is φ = 19906560.

The previous prime is 51424039. The next prime is 51424123. The reversal of 51424065 is 56042415.

It is not a de Polignac number, because 51424065 - 2⁵ = 51424033 is a prime.

It is a super-2 number, since 2×51424065² = 5288868922248450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 530097 + ... + 530193.

Almost surely, 2^51424065 is an apocalyptic number.

51424065 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51424065 is an abundant number, since it is smaller than the sum of its proper divisors (71519679).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51424065 is a wasteful number, since it uses less digits than its factorization.

51424065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 51424065 is about 7171.0574534025. The cubic root of 51424065 is about 371.8679942658.

The spelling of 51424065 in words is "fifty-one million, four hundred twenty-four thousand, sixty-five".