621539223 has 8 divisors (see below), whose sum is σ = 857295600. Its totient is φ = 400071168.

The previous prime is 621539203. The next prime is 621539231. The reversal of 621539223 is 322935126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621539223 - 2¹⁶ = 621473687 is a prime.

It is a super-2 number, since 2×621539223² = 772622011454887458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621539203) 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, 3571978 + ... + 3572151.

It is an arithmetic number, because the mean of its divisors is an integer number (107161950).

Almost surely, 2^621539223 is an apocalyptic number.

621539223 is a deficient number, since it is larger than the sum of its proper divisors (235756377).

621539223 is a wasteful number, since it uses less digits than its factorization.

621539223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144161.

The product of its digits is 19440, while the sum is 33.

The square root of 621539223 is about 24930.6883779811. The cubic root of 621539223 is about 853.4069594710.

The spelling of 621539223 in words is "six hundred twenty-one million, five hundred thirty-nine thousand, two hundred twenty-three".