51293385 has 64 divisors (see below), whose sum is σ = 107170560. Its totient is φ = 22947840.

The previous prime is 51293383. The next prime is 51293387. The reversal of 51293385 is 58339215.

51293385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51293383) and next prime (51293387).

It is not a de Polignac number, because 51293385 - 2¹ = 51293383 is a prime.

It is a super-2 number, since 2×51293385² = 5262022689516450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51293383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17977 + ... + 20633.

It is an arithmetic number, because the mean of its divisors is an integer number (1674540).

Almost surely, 2^51293385 is an apocalyptic number.

51293385 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51293385 is an abundant number, since it is smaller than the sum of its proper divisors (55877175).

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

51293385 is a wasteful number, since it uses less digits than its factorization.

51293385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695 (or 2689 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 51293385 is about 7161.9400304666. The cubic root of 51293385 is about 371.5527272672.

The spelling of 51293385 in words is "fifty-one million, two hundred ninety-three thousand, three hundred eighty-five".