22221547542 has 24 divisors (see below), whose sum is σ = 49447949616. Its totient is φ = 7206988176.

The previous prime is 22221547531. The next prime is 22221547567. The reversal of 22221547542 is 24574512222.

It is a super-2 number, since 2×22221547542² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22221547497 and 22221547506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16682178 + ... + 16683509.

It is an arithmetic number, because the mean of its divisors is an integer number (2060331234).

Almost surely, 2^22221547542 is an apocalyptic number.

22221547542 is an abundant number, since it is smaller than the sum of its proper divisors (27226402074).

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

22221547542 is a wasteful number, since it uses less digits than its factorization.

22221547542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33365732 (or 33365729 counting only the distinct ones).

The product of its digits is 89600, while the sum is 36.

The spelling of 22221547542 in words is "twenty-two billion, two hundred twenty-one million, five hundred forty-seven thousand, five hundred forty-two".