22515004240 has 40 divisors (see below), whose sum is σ = 52401476448. Its totient is φ = 8996695680.

The previous prime is 22515004231. The next prime is 22515004247. The reversal of 22515004240 is 4240051522.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22515004247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67242 + ... + 222601.

Almost surely, 2^22515004240 is an apocalyptic number.

22515004240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22515004240 is an abundant number, since it is smaller than the sum of its proper divisors (29886472208).

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

22515004240 is a wasteful number, since it uses less digits than its factorization.

22515004240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290827 (or 290821 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 22515004240 its reverse (4240051522), we get a palindrome (26755055762).

The spelling of 22515004240 in words is "twenty-two billion, five hundred fifteen million, four thousand, two hundred forty".