21522413423240 has 32 divisors (see below), whose sum is σ = 48433527284760. Its totient is φ = 8607525888000.

The previous prime is 21522413423233. The next prime is 21522413423333. The reversal of 21522413423240 is 4232431422512.

It can be written as a sum of positive squares in 4 ways, for example, as 9144442944484 + 12377970478756 = 3023978^2 + 3518234^2 .

It is a super-2 number, since 2×21522413423240² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21522413423240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44741561 + ... + 45220040.

Almost surely, 2^{21522413423240} is an apocalyptic number.

21522413423240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21522413423240 is an abundant number, since it is smaller than the sum of its proper divisors (26911113861520).

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

21522413423240 is a wasteful number, since it uses less digits than its factorization.

21522413423240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89967593 (or 89967589 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 21522413423240 its reverse (4232431422512), we get a palindrome (25754844845752).

The spelling of 21522413423240 in words is "twenty-one trillion, five hundred twenty-two billion, four hundred thirteen million, four hundred twenty-three thousand, two hundred forty".