25220531541 has 4 divisors (see below), whose sum is σ = 33627375392. Its totient is φ = 16813687692.

The previous prime is 25220531503. The next prime is 25220531561. The reversal of 25220531541 is 14513502252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25220531541 - 2⁶ = 25220531477 is a prime.

It is a super-2 number, since 2×25220531541² (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 = 25220531499 and 25220531508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25220531561) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4203421921 + ... + 4203421926.

It is an arithmetic number, because the mean of its divisors is an integer number (8406843848).

Almost surely, 2^25220531541 is an apocalyptic number.

It is an amenable number.

25220531541 is a deficient number, since it is larger than the sum of its proper divisors (8406843851).

25220531541 is an equidigital number, since it uses as much as digits as its factorization.

25220531541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8406843850.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 25220531541 in words is "twenty-five billion, two hundred twenty million, five hundred thirty-one thousand, five hundred forty-one".