25158121222 has 16 divisors (see below), whose sum is σ = 40832657712. Its totient is φ = 11556407520.

The previous prime is 25158121189. The next prime is 25158121243. The reversal of 25158121222 is 22212185152.

It is a congruent number.

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, 2287453 + ... + 2298424.

It is an arithmetic number, because the mean of its divisors is an integer number (2552041107).

Almost surely, 2^25158121222 is an apocalyptic number.

25158121222 is a deficient number, since it is larger than the sum of its proper divisors (15674536490).

25158121222 is a wasteful number, since it uses less digits than its factorization.

25158121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4586103.

The product of its digits is 6400, while the sum is 31.

The spelling of 25158121222 in words is "twenty-five billion, one hundred fifty-eight million, one hundred twenty-one thousand, two hundred twenty-two".