21874225715 has 8 divisors (see below), whose sum is σ = 26250745248. Its totient is φ = 17498264320.

The previous prime is 21874225691. The next prime is 21874225717. The reversal of 21874225715 is 51752247812.

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

It is not a de Polignac number, because 21874225715 - 2⁶ = 21874225651 is a prime.

It is a super-2 number, since 2×21874225715² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21874225717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47831 + ... + 214560.

It is an arithmetic number, because the mean of its divisors is an integer number (3281343156).

Almost surely, 2^21874225715 is an apocalyptic number.

21874225715 is a deficient number, since it is larger than the sum of its proper divisors (4376519533).

21874225715 is a wasteful number, since it uses less digits than its factorization.

21874225715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279069.

The product of its digits is 313600, while the sum is 44.

The spelling of 21874225715 in words is "twenty-one billion, eight hundred seventy-four million, two hundred twenty-five thousand, seven hundred fifteen".