25215473 has 2 divisors, whose sum is σ = 25215474. Its totient is φ = 25215472.

The previous prime is 25215401. The next prime is 25215481. The reversal of 25215473 is 37451252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20584369 + 4631104 = 4537^2 + 2152^2 .

It is a cyclic number.

It is not a de Polignac number, because 25215473 - 2¹⁸ = 24953329 is a prime.

It is a super-2 number, since 2×25215473² = 1271640157227458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25214473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12607736 + 12607737.

It is an arithmetic number, because the mean of its divisors is an integer number (12607737).

Almost surely, 2^25215473 is an apocalyptic number.

It is an amenable number.

25215473 is a deficient number, since it is larger than the sum of its proper divisors (1).

25215473 is an equidigital number, since it uses as much as digits as its factorization.

25215473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 29.

The square root of 25215473 is about 5021.5010703972. The cubic root of 25215473 is about 293.2394343334.

The spelling of 25215473 in words is "twenty-five million, two hundred fifteen thousand, four hundred seventy-three".