15223433240 has 32 divisors (see below), whose sum is σ = 34295773680. Its totient is φ = 6081720192.

The previous prime is 15223433237. The next prime is 15223433243. The reversal of 15223433240 is 4233432251.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15223433237) and next prime (15223433243).

It is a super-2 number, since 2×15223433240² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15223433243) 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, 206882 + ... + 270641.

Almost surely, 2^15223433240 is an apocalyptic number.

15223433240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15223433240 is an abundant number, since it is smaller than the sum of its proper divisors (19072340440).

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

15223433240 is a wasteful number, since it uses less digits than its factorization.

15223433240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478331 (or 478327 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 15223433240 its reverse (4233432251), we get a palindrome (19456865491).

The spelling of 15223433240 in words is "fifteen billion, two hundred twenty-three million, four hundred thirty-three thousand, two hundred forty".