25155230031 has 24 divisors (see below), whose sum is σ = 36551623680. Its totient is φ = 16670477376.

The previous prime is 25155229963. The next prime is 25155230057. The reversal of 25155230031 is 13003255152.

It is a happy number.

25155230031 is a `hidden beast` number, since 2 + 51 + 552 + 30 + 0 + 31 = 666.

It is not a de Polignac number, because 25155230031 - 2¹¹ = 25155227983 is a prime.

It is a super-2 number, since 2×25155230031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25155229977 and 25155230004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25155230731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2262121 + ... + 2273213.

It is an arithmetic number, because the mean of its divisors is an integer number (1522984320).

Almost surely, 2^25155230031 is an apocalyptic number.

25155230031 is a deficient number, since it is larger than the sum of its proper divisors (11396393649).

25155230031 is a wasteful number, since it uses less digits than its factorization.

25155230031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12575 (or 12572 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 25155230031 its reverse (13003255152), we get a palindrome (38158485183).

The spelling of 25155230031 in words is "twenty-five billion, one hundred fifty-five million, two hundred thirty thousand, thirty-one".