621052516 has 48 divisors (see below), whose sum is σ = 1309271040. Its totient is φ = 252120960.

The previous prime is 621052513. The next prime is 621052541. The reversal of 621052516 is 615250126.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (621052513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35821 + ... + 50251.

It is an arithmetic number, because the mean of its divisors is an integer number (27276480).

Almost surely, 2^621052516 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 621052516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (654635520).

621052516 is an abundant number, since it is smaller than the sum of its proper divisors (688218524).

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

621052516 is a wasteful number, since it uses less digits than its factorization.

621052516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14524 (or 14522 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 621052516 is about 24920.9252637217. The cubic root of 621052516 is about 853.1841429585.

The spelling of 621052516 in words is "six hundred twenty-one million, fifty-two thousand, five hundred sixteen".