621155132 has 12 divisors (see below), whose sum is σ = 1170638616. Its totient is φ = 286686960.

The previous prime is 621155107. The next prime is 621155141. The reversal of 621155132 is 231551126.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5972594 + ... + 5972697.

It is an arithmetic number, because the mean of its divisors is an integer number (97553218).

Almost surely, 2^621155132 is an apocalyptic number.

It is an amenable number.

621155132 is a deficient number, since it is larger than the sum of its proper divisors (549483484).

621155132 is a wasteful number, since it uses less digits than its factorization.

621155132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11945308 (or 11945306 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 621155132 is about 24922.9840107480. The cubic root of 621155132 is about 853.2311306770.

The spelling of 621155132 in words is "six hundred twenty-one million, one hundred fifty-five thousand, one hundred thirty-two".