22215522402 has 64 divisors (see below), whose sum is σ = 50347008000. Its totient is φ = 7259011344.

The previous prime is 22215522401. The next prime is 22215522403. The reversal of 22215522402 is 20422551222.

It is a happy number.

22215522402 is a `hidden beast` number, since 22 + 215 + 5 + 22 + 402 = 666.

It is an interprime number because it is at equal distance from previous prime (22215522401) and next prime (22215522403).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22215522401) 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, 1134063 + ... + 1153485.

It is an arithmetic number, because the mean of its divisors is an integer number (786672000).

Almost surely, 2^22215522402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22215522402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25173504000).

22215522402 is an abundant number, since it is smaller than the sum of its proper divisors (28131485598).

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

22215522402 is a wasteful number, since it uses less digits than its factorization.

22215522402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19852 (or 19846 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The spelling of 22215522402 in words is "twenty-two billion, two hundred fifteen million, five hundred twenty-two thousand, four hundred two".