51262520 has 16 divisors (see below), whose sum is σ = 115340760. Its totient is φ = 20504992.

The previous prime is 51262511. The next prime is 51262529. The reversal of 51262520 is 2526215.

It is an interprime number because it is at equal distance from previous prime (51262511) and next prime (51262529).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51262529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640742 + ... + 640821.

Almost surely, 2^51262520 is an apocalyptic number.

It is an amenable number.

51262520 is an abundant number, since it is smaller than the sum of its proper divisors (64078240).

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

51262520 is a wasteful number, since it uses less digits than its factorization.

51262520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281574 (or 1281570 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 51262520 is about 7159.7849129705. The cubic root of 51262520 is about 371.4781869477.

Adding to 51262520 its reverse (2526215), we get a palindrome (53788735).

The spelling of 51262520 in words is "fifty-one million, two hundred sixty-two thousand, five hundred twenty".