51515562 has 48 divisors (see below), whose sum is σ = 120821760. Its totient is φ = 14599872.

The previous prime is 51515551. The next prime is 51515567. The reversal of 51515562 is 26551515.

It is not an unprimeable number, because it can be changed into a prime (51515567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39639 + ... + 40917.

It is an arithmetic number, because the mean of its divisors is an integer number (2517120).

Almost surely, 2^51515562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51515562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60410880).

51515562 is an abundant number, since it is smaller than the sum of its proper divisors (69306198).

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

51515562 is a wasteful number, since it uses less digits than its factorization.

51515562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1428 counting only the distinct ones).

The product of its digits is 7500, while the sum is 30.

The square root of 51515562 is about 7177.4342212242. The cubic root of 51515562 is about 372.0884140640.

The spelling of 51515562 in words is "fifty-one million, five hundred fifteen thousand, five hundred sixty-two".