51667875 has 88 divisors (see below), whose sum is σ = 110539104. Its totient is φ = 23619600.

The previous prime is 51667871. The next prime is 51667883. The reversal of 51667875 is 57876615.

51667875 is a `hidden beast` number, since 516 + 67 + 8 + 75 = 666.

It is not a de Polignac number, because 51667875 - 2² = 51667871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (352800) is a multiple of the sum of its prime divisors (15).

It is a self number, because there is not a number n which added to its sum of digits gives 51667875.

It is not an unprimeable number, because it can be changed into a prime (51667871) by changing a digit.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 7381122 + ... + 7381128.

It is a vampire number, since it can be written as 6561 ⋅ 7875 (with its own digits).

Almost surely, 2^51667875 is an apocalyptic number.

51667875 is an abundant number, since it is smaller than the sum of its proper divisors (58871229).

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

51667875 is an frugal number, since it uses more digits than its factorization.

51667875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52 (or 15 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 51667875 is about 7188.0369364660. The cubic root of 51667875 is about 372.4547638115.

It can be divided in two parts, 5166 and 7875, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 51667875 in words is "fifty-one million, six hundred sixty-seven thousand, eight hundred seventy-five".