51552506 has 4 divisors (see below), whose sum is σ = 77328762. Its totient is φ = 25776252.

The previous prime is 51552497. The next prime is 51552509. The reversal of 51552506 is 60525515.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25959025 + 25593481 = 5095^2 + 5059^2 .

It is not an unprimeable number, because it can be changed into a prime (51552509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12888125 + ... + 12888128.

Almost surely, 2^51552506 is an apocalyptic number.

51552506 is a deficient number, since it is larger than the sum of its proper divisors (25776256).

51552506 is a wasteful number, since it uses less digits than its factorization.

51552506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25776255.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 51552506 is about 7180.0073816118. The cubic root of 51552506 is about 372.1773396177.

The spelling of 51552506 in words is "fifty-one million, five hundred fifty-two thousand, five hundred six".