621010172 has 12 divisors (see below), whose sum is σ = 1090809720. Its totient is φ = 309350256.

The previous prime is 621010157. The next prime is 621010253. The reversal of 621010172 is 271010126.

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, 287498 + ... + 289649.

It is an arithmetic number, because the mean of its divisors is an integer number (90900810).

Almost surely, 2^621010172 is an apocalyptic number.

It is an amenable number.

621010172 is a deficient number, since it is larger than the sum of its proper divisors (469799548).

621010172 is a wasteful number, since it uses less digits than its factorization.

621010172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577420 (or 577418 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 621010172 is about 24920.0756820681. The cubic root of 621010172 is about 853.1647521933.

Adding to 621010172 its reverse (271010126), we get a palindrome (892020298).

The spelling of 621010172 in words is "six hundred twenty-one million, ten thousand, one hundred seventy-two".