25137117331 has 4 divisors (see below), whose sum is σ = 25137461464. Its totient is φ = 25136773200.

The previous prime is 25137117311. The next prime is 25137117347. The reversal of 25137117331 is 13371173152.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25137117331 - 2¹³ = 25137109139 is a prime.

It is a super-2 number, since 2×25137117331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25137117311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14250 + ... + 224671.

It is an arithmetic number, because the mean of its divisors is an integer number (6284365366).

Almost surely, 2^25137117331 is an apocalyptic number.

25137117331 is a deficient number, since it is larger than the sum of its proper divisors (344133).

25137117331 is a wasteful number, since it uses less digits than its factorization.

25137117331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344132.

The product of its digits is 13230, while the sum is 34.

The spelling of 25137117331 in words is "twenty-five billion, one hundred thirty-seven million, one hundred seventeen thousand, three hundred thirty-one".