51700620 has 96 divisors (see below), whose sum is σ = 153457920. Its totient is φ = 12983040.

The previous prime is 51700601. The next prime is 51700651. The reversal of 51700620 is 2600715.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74475 + ... + 75165.

It is an arithmetic number, because the mean of its divisors is an integer number (1598520).

Almost surely, 2^51700620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51700620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76728960).

51700620 is an abundant number, since it is smaller than the sum of its proper divisors (101757300).

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

51700620 is a wasteful number, since it uses less digits than its factorization.

51700620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 51700620 is about 7190.3143185816. The cubic root of 51700620 is about 372.5334294278.

The spelling of 51700620 in words is "fifty-one million, seven hundred thousand, six hundred twenty".