21523422310 has 64 divisors (see below), whose sum is σ = 43936421760. Its totient is φ = 7531729920.

The previous prime is 21523422307. The next prime is 21523422313. The reversal of 21523422310 is 1322432512.

It is an interprime number because it is at equal distance from previous prime (21523422307) and next prime (21523422313).

It is a super-2 number, since 2×21523422310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21523422313) 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, 292890 + ... + 358930.

It is an arithmetic number, because the mean of its divisors is an integer number (686506590).

Almost surely, 2^21523422310 is an apocalyptic number.

21523422310 is an abundant number, since it is smaller than the sum of its proper divisors (22412999450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21523422310 is a wasteful number, since it uses less digits than its factorization.

21523422310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66193.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21523422310 its reverse (1322432512), we get a palindrome (22845854822).

The spelling of 21523422310 in words is "twenty-one billion, five hundred twenty-three million, four hundred twenty-two thousand, three hundred ten".