51520308 has 24 divisors (see below), whose sum is σ = 137387712. Its totient is φ = 14720064.

The previous prime is 51520307. The next prime is 51520333. The reversal of 51520308 is 80302515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51520303) 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, 306585 + ... + 306752.

It is an arithmetic number, because the mean of its divisors is an integer number (5724488).

Almost surely, 2^51520308 is an apocalyptic number.

It is an amenable number.

51520308 is an abundant number, since it is smaller than the sum of its proper divisors (85867404).

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

51520308 is a wasteful number, since it uses less digits than its factorization.

51520308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613351 (or 613349 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51520308 is about 7177.7648331497. The cubic root of 51520308 is about 372.0998402384.

The spelling of 51520308 in words is "fifty-one million, five hundred twenty thousand, three hundred eight".