25221171148 has 12 divisors (see below), whose sum is σ = 44139054960. Its totient is φ = 12610012592.

The previous prime is 25221171137. The next prime is 25221171163. The reversal of 25221171148 is 84117112252.

It is a super-2 number, since 2×25221171148² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35143 + ... + 227326.

It is an arithmetic number, because the mean of its divisors is an integer number (3678254580).

Almost surely, 2^25221171148 is an apocalyptic number.

It is an amenable number.

25221171148 is a deficient number, since it is larger than the sum of its proper divisors (18917883812).

25221171148 is a wasteful number, since it uses less digits than its factorization.

25221171148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286496 (or 286494 counting only the distinct ones).

The product of its digits is 8960, while the sum is 34.

The spelling of 25221171148 in words is "twenty-five billion, two hundred twenty-one million, one hundred seventy-one thousand, one hundred forty-eight".