51145375 has 8 divisors (see below), whose sum is σ = 63829584. Its totient is φ = 40916200.

The previous prime is 51145349. The next prime is 51145379. The reversal of 51145375 is 57354115.

It is not a de Polignac number, because 51145375 - 2⁵ = 51145343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204457 + ... + 204706.

It is an arithmetic number, because the mean of its divisors is an integer number (7978698).

Almost surely, 2^51145375 is an apocalyptic number.

51145375 is a deficient number, since it is larger than the sum of its proper divisors (12684209).

51145375 is an equidigital number, since it uses as much as digits as its factorization.

51145375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409178 (or 409168 counting only the distinct ones).

The product of its digits is 10500, while the sum is 31.

The square root of 51145375 is about 7151.5994714469. The cubic root of 51145375 is about 371.1950040782.

The spelling of 51145375 in words is "fifty-one million, one hundred forty-five thousand, three hundred seventy-five".