621224652 has 12 divisors (see below), whose sum is σ = 1449524216. Its totient is φ = 207074880.

The previous prime is 621224651. The next prime is 621224683. The reversal of 621224652 is 256422126.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×621224652² = 771840136505042208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621224651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25884349 + ... + 25884372.

Almost surely, 2^621224652 is an apocalyptic number.

It is an amenable number.

621224652 is an abundant number, since it is smaller than the sum of its proper divisors (828299564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621224652 is a wasteful number, since it uses less digits than its factorization.

621224652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51768728 (or 51768726 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 621224652 is about 24924.3786682838. The cubic root of 621224652 is about 853.2629608444.

Adding to 621224652 its reverse (256422126), we get a palindrome (877646778).

The spelling of 621224652 in words is "six hundred twenty-one million, two hundred twenty-four thousand, six hundred fifty-two".