621051131 has 2 divisors, whose sum is σ = 621051132. Its totient is φ = 621051130.

The previous prime is 621051103. The next prime is 621051161. The reversal of 621051131 is 131150126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621051131 - 2¹⁴ = 621034747 is a prime.

It is a super-2 number, since 2×621051131² = 771409014632758322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (621051161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310525565 + 310525566.

It is an arithmetic number, because the mean of its divisors is an integer number (310525566).

Almost surely, 2^621051131 is an apocalyptic number.

621051131 is a deficient number, since it is larger than the sum of its proper divisors (1).

621051131 is an equidigital number, since it uses as much as digits as its factorization.

621051131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 621051131 is about 24920.8974758133. The cubic root of 621051131 is about 853.1835087336.

It can be divided in two parts, 62105 and 1131, that added together give a palindrome (63236).

The spelling of 621051131 in words is "six hundred twenty-one million, fifty-one thousand, one hundred thirty-one".