45861531 has 4 divisors (see below), whose sum is σ = 61148712. Its totient is φ = 30574352.

The previous prime is 45861509. The next prime is 45861547. The reversal of 45861531 is 13516854.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45861531 is a prime.

It is a super-2 number, since 2×45861531² = 4206560051327922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45861492 and 45861501.

It is not an unprimeable number, because it can be changed into a prime (45861131) 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, 7643586 + ... + 7643591.

It is an arithmetic number, because the mean of its divisors is an integer number (15287178).

Almost surely, 2^45861531 is an apocalyptic number.

45861531 is a deficient number, since it is larger than the sum of its proper divisors (15287181).

45861531 is a wasteful number, since it uses less digits than its factorization.

45861531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15287180.

The product of its digits is 14400, while the sum is 33.

The square root of 45861531 is about 6772.1142193557. The cubic root of 45861531 is about 357.9449032486.

The spelling of 45861531 in words is "forty-five million, eight hundred sixty-one thousand, five hundred thirty-one".