25221522001 has 8 divisors (see below), whose sum is σ = 27184538304. Its totient is φ = 23261777040.

The previous prime is 25221521971. The next prime is 25221522043. The reversal of 25221522001 is 10022512252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25221522001 - 2⁷ = 25221521873 is a prime.

It is a super-2 number, since 2×25221522001² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25221522101) 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 7 ways as a sum of consecutive naturals, for example, 801805 + ... + 832666.

It is an arithmetic number, because the mean of its divisors is an integer number (3398067288).

Almost surely, 2^25221522001 is an apocalyptic number.

It is an amenable number.

25221522001 is a deficient number, since it is larger than the sum of its proper divisors (1963016303).

25221522001 is a wasteful number, since it uses less digits than its factorization.

25221522001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635671.

The product of its (nonzero) digits is 800, while the sum is 22.

The spelling of 25221522001 in words is "twenty-five billion, two hundred twenty-one million, five hundred twenty-two thousand, one".