1625255251 has 2 divisors, whose sum is σ = 1625255252. Its totient is φ = 1625255250.

The previous prime is 1625255227. The next prime is 1625255257. The reversal of 1625255251 is 1525525261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1625255251 - 2⁹ = 1625254739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1625255257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812627625 + 812627626.

It is an arithmetic number, because the mean of its divisors is an integer number (812627626).

Almost surely, 2^1625255251 is an apocalyptic number.

1625255251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625255251 is an equidigital number, since it uses as much as digits as its factorization.

1625255251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30000, while the sum is 34.

The square root of 1625255251 is about 40314.4546161795. The cubic root of 1625255251 is about 1175.7288976151.

The spelling of 1625255251 in words is "one billion, six hundred twenty-five million, two hundred fifty-five thousand, two hundred fifty-one".