625421131 has 2 divisors, whose sum is σ = 625421132. Its totient is φ = 625421130.

The previous prime is 625421053. The next prime is 625421161. The reversal of 625421131 is 131124526.

It is a happy number.

625421131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625421131 - 2⁹ = 625420619 is a prime.

It is a super-2 number, since 2×625421131² = 782303182202638322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 625421096 and 625421105.

It is not a weakly prime, because it can be changed into another prime (625421161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312710565 + 312710566.

It is an arithmetic number, because the mean of its divisors is an integer number (312710566).

Almost surely, 2^625421131 is an apocalyptic number.

625421131 is a deficient number, since it is larger than the sum of its proper divisors (1).

625421131 is an equidigital number, since it uses as much as digits as its factorization.

625421131 is an odious number, because the sum of its binary digits is odd.

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

The square root of 625421131 is about 25008.4212016672. The cubic root of 625421131 is about 855.1799632580.

Adding to 625421131 its reverse (131124526), we get a palindrome (756545657).

The spelling of 625421131 in words is "six hundred twenty-five million, four hundred twenty-one thousand, one hundred thirty-one".