25242215361 has 16 divisors (see below), whose sum is σ = 37263952128. Its totient is φ = 15069978000.

The previous prime is 25242215353. The next prime is 25242215363. The reversal of 25242215361 is 16351224252.

It is a happy number.

It is not a de Polignac number, because 25242215361 - 2³ = 25242215353 is a prime.

It is a super-2 number, since 2×25242215361² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25242215363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5706115 + ... + 5710536.

It is an arithmetic number, because the mean of its divisors is an integer number (2328997008).

Almost surely, 2^25242215361 is an apocalyptic number.

It is an amenable number.

25242215361 is a deficient number, since it is larger than the sum of its proper divisors (12021736767).

25242215361 is a wasteful number, since it uses less digits than its factorization.

25242215361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11416732.

The product of its digits is 28800, while the sum is 33.

The spelling of 25242215361 in words is "twenty-five billion, two hundred forty-two million, two hundred fifteen thousand, three hundred sixty-one".