25221160040 has 32 divisors (see below), whose sum is σ = 57677904360. Its totient is φ = 9923078400.

The previous prime is 25221160037. The next prime is 25221160087. The reversal of 25221160040 is 4006112252.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20408408164 + 4812751876 = 142858^2 + 69374^2 .

It is a super-2 number, since 2×25221160040² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25221159988 and 25221160015.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5165831 + ... + 5170710.

Almost surely, 2^25221160040 is an apocalyptic number.

25221160040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25221160040 is an abundant number, since it is smaller than the sum of its proper divisors (32456744320).

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

25221160040 is a wasteful number, since it uses less digits than its factorization.

25221160040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10336613 (or 10336609 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 25221160040 its reverse (4006112252), we get a palindrome (29227272292).

The spelling of 25221160040 in words is "twenty-five billion, two hundred twenty-one million, one hundred sixty thousand, forty".