25230440403 has 18 divisors (see below), whose sum is σ = 42394006044. Its totient is φ = 14417394264.

The previous prime is 25230440371. The next prime is 25230440437. The reversal of 25230440403 is 30404403252.

25230440403 is a `hidden beast` number, since 25 + 230 + 4 + 4 + 0 + 403 = 666.

It is not a de Polignac number, because 25230440403 - 2⁵ = 25230440371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25230440453) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28605501 + ... + 28606382.

It is an arithmetic number, because the mean of its divisors is an integer number (2355222558).

Almost surely, 2^25230440403 is an apocalyptic number.

25230440403 is a deficient number, since it is larger than the sum of its proper divisors (17163565641).

25230440403 is a wasteful number, since it uses less digits than its factorization.

25230440403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57211903 (or 57211893 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

Adding to 25230440403 its reverse (30404403252), we get a palindrome (55634843655).

The spelling of 25230440403 in words is "twenty-five billion, two hundred thirty million, four hundred forty thousand, four hundred three".