11321531390 has 72 divisors (see below), whose sum is σ = 22805007624. Its totient is φ = 4044830400.

The previous prime is 11321531371. The next prime is 11321531407. The reversal of 11321531390 is 9313512311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1620605 + ... + 1627575.

It is an arithmetic number, because the mean of its divisors is an integer number (316736217).

Almost surely, 2^11321531390 is an apocalyptic number.

11321531390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11321531390 is an abundant number, since it is smaller than the sum of its proper divisors (11483476234).

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

11321531390 is a wasteful number, since it uses less digits than its factorization.

11321531390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7066 (or 7022 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 29.

The spelling of 11321531390 in words is "eleven billion, three hundred twenty-one million, five hundred thirty-one thousand, three hundred ninety".