621125630 has 8 divisors (see below), whose sum is σ = 1118026152. Its totient is φ = 248450248.

The previous prime is 621125597. The next prime is 621125657. The reversal of 621125630 is 36521126.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 621125630.

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, 31056272 + ... + 31056291.

It is an arithmetic number, because the mean of its divisors is an integer number (139753269).

Almost surely, 2^621125630 is an apocalyptic number.

621125630 is a deficient number, since it is larger than the sum of its proper divisors (496900522).

621125630 is a wasteful number, since it uses less digits than its factorization.

621125630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62112570.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 621125630 is about 24922.3921404026. The cubic root of 621125630 is about 853.2176222838.

Adding to 621125630 its reverse (36521126), we get a palindrome (657646756).

The spelling of 621125630 in words is "six hundred twenty-one million, one hundred twenty-five thousand, six hundred thirty".