621131053 has 2 divisors, whose sum is σ = 621131054. Its totient is φ = 621131052.

The previous prime is 621131051. The next prime is 621131083. The reversal of 621131053 is 350131126.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443228809 + 177902244 = 21053^2 + 13338^2 .

It is a cyclic number.

It is not a de Polignac number, because 621131053 - 2¹ = 621131051 is a prime.

Together with 621131051, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621131051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310565526 + 310565527.

It is an arithmetic number, because the mean of its divisors is an integer number (310565527).

Almost surely, 2^621131053 is an apocalyptic number.

It is an amenable number.

621131053 is a deficient number, since it is larger than the sum of its proper divisors (1).

621131053 is an equidigital number, since it uses as much as digits as its factorization.

621131053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 621131053 is about 24922.5009379075. The cubic root of 621131053 is about 853.2201054023.

Adding to 621131053 its reverse (350131126), we get a palindrome (971262179).

The spelling of 621131053 in words is "six hundred twenty-one million, one hundred thirty-one thousand, fifty-three".