45991231 has 8 divisors (see below), whose sum is σ = 54031824. Its totient is φ = 38593920.

The previous prime is 45991223. The next prime is 45991243. The reversal of 45991231 is 13219954.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45991231 - 2³ = 45991223 is a prime.

It is a super-2 number, since 2×45991231² = 4230386657790722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45991261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160666 + ... + 160951.

It is an arithmetic number, because the mean of its divisors is an integer number (6753978).

Almost surely, 2^45991231 is an apocalyptic number.

45991231 is a deficient number, since it is larger than the sum of its proper divisors (8040593).

45991231 is a wasteful number, since it uses less digits than its factorization.

45991231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321641.

The product of its digits is 9720, while the sum is 34.

The square root of 45991231 is about 6781.6834930569. The cubic root of 45991231 is about 358.2820177222.

The spelling of 45991231 in words is "forty-five million, nine hundred ninety-one thousand, two hundred thirty-one".