51816525 has 12 divisors (see below), whose sum is σ = 85670112. Its totient is φ = 27635440.

The previous prime is 51816467. The next prime is 51816547. The reversal of 51816525 is 52561815.

It is not a de Polignac number, because 51816525 - 2⁶ = 51816461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345369 + ... + 345518.

It is an arithmetic number, because the mean of its divisors is an integer number (7139176).

Almost surely, 2^51816525 is an apocalyptic number.

It is an amenable number.

51816525 is a deficient number, since it is larger than the sum of its proper divisors (33853587).

51816525 is a wasteful number, since it uses less digits than its factorization.

51816525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690900 (or 690895 counting only the distinct ones).

The product of its digits is 12000, while the sum is 33.

The square root of 51816525 is about 7198.3696070708. The cubic root of 51816525 is about 372.8116095909.

The spelling of 51816525 in words is "fifty-one million, eight hundred sixteen thousand, five hundred twenty-five".