9181380231 has 24 divisors (see below), whose sum is σ = 13335529584. Its totient is φ = 6087070080.

The previous prime is 9181380209. The next prime is 9181380259. The reversal of 9181380231 is 1320831819.

It is not a de Polignac number, because 9181380231 - 2⁵ = 9181380199 is a prime.

It is a super-2 number, since 2×9181380231² (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 (9181380031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1380045 + ... + 1386681.

It is an arithmetic number, because the mean of its divisors is an integer number (555647066).

Almost surely, 2^9181380231 is an apocalyptic number.

9181380231 is a deficient number, since it is larger than the sum of its proper divisors (4154149353).

9181380231 is a wasteful number, since it uses less digits than its factorization.

9181380231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7471 (or 7468 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 9181380231 is about 95819.5190501393. The cubic root of 9181380231 is about 2093.9645474467.

The spelling of 9181380231 in words is "nine billion, one hundred eighty-one million, three hundred eighty thousand, two hundred thirty-one".