21722543315 has 32 divisors (see below), whose sum is σ = 29728359936. Its totient is φ = 15083228160.

The previous prime is 21722543267. The next prime is 21722543317. The reversal of 21722543315 is 51334522712.

It is not a de Polignac number, because 21722543315 - 2²² = 21718349011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21722543317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 676259 + ... + 707651.

It is an arithmetic number, because the mean of its divisors is an integer number (929011248).

Almost surely, 2^21722543315 is an apocalyptic number.

21722543315 is a deficient number, since it is larger than the sum of its proper divisors (8005816621).

21722543315 is a wasteful number, since it uses less digits than its factorization.

21722543315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31979.

The product of its digits is 50400, while the sum is 35.

The spelling of 21722543315 in words is "twenty-one billion, seven hundred twenty-two million, five hundred forty-three thousand, three hundred fifteen".