51155307 has 40 divisors (see below), whose sum is σ = 88467456. Its totient is φ = 28852848.

The previous prime is 51155297. The next prime is 51155311. The reversal of 51155307 is 70355115.

It is not a de Polignac number, because 51155307 - 2¹⁶ = 51089771 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (51155347) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46518 + ... + 47604.

Almost surely, 2^51155307 is an apocalyptic number.

51155307 is a deficient number, since it is larger than the sum of its proper divisors (37312149).

51155307 is a wasteful number, since it uses less digits than its factorization.

51155307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189 (or 1180 counting only the distinct ones).

The product of its (nonzero) digits is 2625, while the sum is 27.

The square root of 51155307 is about 7152.2938278569. The cubic root of 51155307 is about 371.2190301683.

The spelling of 51155307 in words is "fifty-one million, one hundred fifty-five thousand, three hundred seven".