25223521240 has 16 divisors (see below), whose sum is σ = 56752922880. Its totient is φ = 10089408480.

The previous prime is 25223521223. The next prime is 25223521243. The reversal of 25223521240 is 4212532252.

It is a super-2 number, since 2×25223521240² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25223521199 and 25223521208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25223521243) 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, 315293976 + ... + 315294055.

It is an arithmetic number, because the mean of its divisors is an integer number (3547057680).

Almost surely, 2^25223521240 is an apocalyptic number.

25223521240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25223521240 is an abundant number, since it is smaller than the sum of its proper divisors (31529401640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25223521240 is a wasteful number, since it uses less digits than its factorization.

25223521240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630588042 (or 630588038 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 25223521240 in words is "twenty-five billion, two hundred twenty-three million, five hundred twenty-one thousand, two hundred forty".