621202381 has 4 divisors (see below), whose sum is σ = 635648992. Its totient is φ = 606755772.

The previous prime is 621202363. The next prime is 621202391. The reversal of 621202381 is 183202126.

621202381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 621202381 - 2⁵ = 621202349 is a prime.

It is a super-2 number, since 2×621202381² = 771784796320138322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621202391) 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, 7223241 + ... + 7223326.

It is an arithmetic number, because the mean of its divisors is an integer number (158912248).

Almost surely, 2^621202381 is an apocalyptic number.

It is an amenable number.

621202381 is a deficient number, since it is larger than the sum of its proper divisors (14446611).

621202381 is a wasteful number, since it uses less digits than its factorization.

621202381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14446610.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 621202381 is about 24923.9318928615. The cubic root of 621202381 is about 853.2527641861.

The spelling of 621202381 in words is "six hundred twenty-one million, two hundred two thousand, three hundred eighty-one".