25550530231 has 32 divisors (see below), whose sum is σ = 27499919040. Its totient is φ = 23670226944.

The previous prime is 25550530223. The next prime is 25550530253. The reversal of 25550530231 is 13203505552.

It is a cyclic number.

It is not a de Polignac number, because 25550530231 - 2³ = 25550530223 is a prime.

It is a super-2 number, since 2×25550530231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25550530193 and 25550530202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25550510231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81630931 + ... + 81631243.

It is an arithmetic number, because the mean of its divisors is an integer number (859372470).

Almost surely, 2^25550530231 is an apocalyptic number.

25550530231 is a deficient number, since it is larger than the sum of its proper divisors (1949388809).

25550530231 is a wasteful number, since it uses less digits than its factorization.

25550530231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835.

The product of its (nonzero) digits is 22500, while the sum is 31.

The spelling of 25550530231 in words is "twenty-five billion, five hundred fifty million, five hundred thirty thousand, two hundred thirty-one".