22515400730 has 32 divisors (see below), whose sum is σ = 41212607760. Its totient is φ = 8854110720.

The previous prime is 22515400727. The next prime is 22515400751. The reversal of 22515400730 is 3700451522.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1602480961 + 20912919769 = 40031^2 + 144613^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22515400693 and 22515400702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1393136 + ... + 1409204.

Almost surely, 2^22515400730 is an apocalyptic number.

22515400730 is a deficient number, since it is larger than the sum of its proper divisors (18697207030).

22515400730 is a wasteful number, since it uses less digits than its factorization.

22515400730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18434.

The product of its (nonzero) digits is 8400, while the sum is 29.

The spelling of 22515400730 in words is "twenty-two billion, five hundred fifteen million, four hundred thousand, seven hundred thirty".