45137531 has 4 divisors (see below), whose sum is σ = 46097952. Its totient is φ = 44177112.

The previous prime is 45137513. The next prime is 45137539. The reversal of 45137531 is 13573154.

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

It is a cyclic number.

It is not a de Polignac number, because 45137531 - 2⁶ = 45137467 is a prime.

It is a super-2 number, since 2×45137531² = 4074793409551922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45137494 and 45137503.

It is not an unprimeable number, because it can be changed into a prime (45137539) 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, 480140 + ... + 480233.

It is an arithmetic number, because the mean of its divisors is an integer number (11524488).

Almost surely, 2^45137531 is an apocalyptic number.

45137531 is a deficient number, since it is larger than the sum of its proper divisors (960421).

45137531 is an equidigital number, since it uses as much as digits as its factorization.

45137531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960420.

The product of its digits is 6300, while the sum is 29.

The square root of 45137531 is about 6718.4470675894. The cubic root of 45137531 is about 356.0513197698.

The spelling of 45137531 in words is "forty-five million, one hundred thirty-seven thousand, five hundred thirty-one".