621536542 has 16 divisors (see below), whose sum is σ = 1017878400. Its totient is φ = 282289240.

The previous prime is 621536483. The next prime is 621536557. The reversal of 621536542 is 245635126.

621536542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 621536498 and 621536507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18309 + ... + 39727.

It is an arithmetic number, because the mean of its divisors is an integer number (63617400).

Almost surely, 2^621536542 is an apocalyptic number.

621536542 is a deficient number, since it is larger than the sum of its proper divisors (396341858).

621536542 is a wasteful number, since it uses less digits than its factorization.

621536542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22751.

The product of its digits is 43200, while the sum is 34.

The square root of 621536542 is about 24930.6346088502. The cubic root of 621536542 is about 853.4057324166.

The spelling of 621536542 in words is "six hundred twenty-one million, five hundred thirty-six thousand, five hundred forty-two".