51142075 has 12 divisors (see below), whose sum is σ = 64035088. Its totient is φ = 40514400.

The previous prime is 51142073. The next prime is 51142097. The reversal of 51142075 is 57024115.

It is not a de Polignac number, because 51142075 - 2¹ = 51142073 is a prime.

It is a super-3 number, since 3×51142075³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51142073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7356 + ... + 12505.

Almost surely, 2^51142075 is an apocalyptic number.

51142075 is a deficient number, since it is larger than the sum of its proper divisors (12893013).

51142075 is a wasteful number, since it uses less digits than its factorization.

51142075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19974 (or 19969 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 51142075 is about 7151.3687501065. The cubic root of 51142075 is about 371.1870204964.

The spelling of 51142075 in words is "fifty-one million, one hundred forty-two thousand, seventy-five".