25235055431 has 4 divisors (see below), whose sum is σ = 25771971552. Its totient is φ = 24698139312.

The previous prime is 25235055427. The next prime is 25235055449. The reversal of 25235055431 is 13455053252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25235055431 - 2² = 25235055427 is a prime.

It is a super-2 number, since 2×25235055431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25235055391 and 25235055400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25235055421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268457990 + ... + 268458083.

It is an arithmetic number, because the mean of its divisors is an integer number (6442992888).

Almost surely, 2^25235055431 is an apocalyptic number.

25235055431 is a deficient number, since it is larger than the sum of its proper divisors (536916121).

25235055431 is an equidigital number, since it uses as much as digits as its factorization.

25235055431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536916120.

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 25235055431 in words is "twenty-five billion, two hundred thirty-five million, fifty-five thousand, four hundred thirty-one".