51525550 has 12 divisors (see below), whose sum is σ = 95837616. Its totient is φ = 20610200.

The previous prime is 51525443. The next prime is 51525557. The reversal of 51525550 is 5552515.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51525557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 515206 + ... + 515305.

It is an arithmetic number, because the mean of its divisors is an integer number (7986468).

Almost surely, 2^51525550 is an apocalyptic number.

51525550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51525550 is a deficient number, since it is larger than the sum of its proper divisors (44312066).

51525550 is a wasteful number, since it uses less digits than its factorization.

51525550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030523 (or 1030518 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 51525550 is about 7178.1299793191. The cubic root of 51525550 is about 372.1124597360.

The spelling of 51525550 in words is "fifty-one million, five hundred twenty-five thousand, five hundred fifty".