51387522 has 16 divisors (see below), whose sum is σ = 106090752. Its totient is φ = 16576560.

The previous prime is 51387521. The next prime is 51387527. The reversal of 51387522 is 22578315.

It is not an unprimeable number, because it can be changed into a prime (51387521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137953 + ... + 138324.

It is an arithmetic number, because the mean of its divisors is an integer number (6630672).

Almost surely, 2^51387522 is an apocalyptic number.

51387522 is an abundant number, since it is smaller than the sum of its proper divisors (54703230).

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

51387522 is a wasteful number, since it uses less digits than its factorization.

51387522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276313.

The product of its digits is 16800, while the sum is 33.

The square root of 51387522 is about 7168.5090500047. The cubic root of 51387522 is about 371.7798877065.

The spelling of 51387522 in words is "fifty-one million, three hundred eighty-seven thousand, five hundred twenty-two".