51875506 has 4 divisors (see below), whose sum is σ = 77813262. Its totient is φ = 25937752.

The previous prime is 51875497. The next prime is 51875521. The reversal of 51875506 is 60557815.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60557815 = 5 ⋅12111563.

It can be written as a sum of positive squares in only one way, i.e., 47734281 + 4141225 = 6909^2 + 2035^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12968875 + ... + 12968878.

Almost surely, 2^51875506 is an apocalyptic number.

51875506 is a deficient number, since it is larger than the sum of its proper divisors (25937756).

51875506 is a wasteful number, since it uses less digits than its factorization.

51875506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25937755.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 51875506 is about 7202.4652723911. The cubic root of 51875506 is about 372.9530089082.

The spelling of 51875506 in words is "fifty-one million, eight hundred seventy-five thousand, five hundred six".