621122650 has 12 divisors (see below), whose sum is σ = 1155288222. Its totient is φ = 248449040.

The previous prime is 621122633. The next prime is 621122683. The reversal of 621122650 is 56221126.

It can be written as a sum of positive squares in 3 ways, for example, as 507465729 + 113656921 = 22527^2 + 10661^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6211177 + ... + 6211276.

Almost surely, 2^621122650 is an apocalyptic number.

621122650 is a deficient number, since it is larger than the sum of its proper divisors (534165572).

621122650 is a wasteful number, since it uses less digits than its factorization.

621122650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12422465 (or 12422460 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 621122650 is about 24922.3323547376. The cubic root of 621122650 is about 853.2162577758.

Adding to 621122650 its reverse (56221126), we get a palindrome (677343776).

The spelling of 621122650 in words is "six hundred twenty-one million, one hundred twenty-two thousand, six hundred fifty".