25315403 has 2 divisors, whose sum is σ = 25315404. Its totient is φ = 25315402.

The previous prime is 25315373. The next prime is 25315421. The reversal of 25315403 is 30451352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25315403 - 2¹⁶ = 25249867 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25315483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12657701 + 12657702.

It is an arithmetic number, because the mean of its divisors is an integer number (12657702).

Almost surely, 2^25315403 is an apocalyptic number.

25315403 is a deficient number, since it is larger than the sum of its proper divisors (1).

25315403 is an equidigital number, since it uses as much as digits as its factorization.

25315403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 25315403 is about 5031.4414435627. The cubic root of 25315403 is about 293.6262972124.

Adding to 25315403 its reverse (30451352), we get a palindrome (55766755).

The spelling of 25315403 in words is "twenty-five million, three hundred fifteen thousand, four hundred three".