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45931 = 231997
BaseRepresentation
bin1011001101101011
32100000011
423031223
52432211
6552351
7250624
oct131553
970004
1045931
1131566
12226b7
1317ba2
1412a4b
15d921
hexb36b

45931 has 4 divisors (see below), whose sum is σ = 47952. Its totient is φ = 43912.

The previous prime is 45893. The next prime is 45943. The reversal of 45931 is 13954.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13954 = 26977.

It is a cyclic number.

It is not a de Polignac number, because 45931 - 215 = 13163 is a prime.

It is a super-2 number, since 2×459312 = 4219313522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (45971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976 + ... + 1021.

It is an arithmetic number, because the mean of its divisors is an integer number (11988).

245931 is an apocalyptic number.

45931 is a deficient number, since it is larger than the sum of its proper divisors (2021).

45931 is a wasteful number, since it uses less digits than its factorization.

45931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020.

The product of its digits is 540, while the sum is 22.

The square root of 45931 is about 214.3151884492. The cubic root of 45931 is about 35.8125545057.

The spelling of 45931 in words is "forty-five thousand, nine hundred thirty-one".

Divisors: 1 23 1997 45931