45661931 has 4 divisors (see below), whose sum is σ = 52185072. Its totient is φ = 39138792.

The previous prime is 45661927. The next prime is 45661933. The reversal of 45661931 is 13916654.

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

It is not a de Polignac number, because 45661931 - 2² = 45661927 is a prime.

It is a super-2 number, since 2×45661931² = 4170023885297522, 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 = 45661891 and 45661900.

It is not an unprimeable number, because it can be changed into a prime (45661933) 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 3 ways as a sum of consecutive naturals, for example, 3261560 + ... + 3261573.

It is an arithmetic number, because the mean of its divisors is an integer number (13046268).

Almost surely, 2^45661931 is an apocalyptic number.

45661931 is a deficient number, since it is larger than the sum of its proper divisors (6523141).

45661931 is an equidigital number, since it uses as much as digits as its factorization.

45661931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6523140.

The product of its digits is 19440, while the sum is 35.

The square root of 45661931 is about 6757.3612453383. The cubic root of 45661931 is about 357.4248617089.

The spelling of 45661931 in words is "forty-five million, six hundred sixty-one thousand, nine hundred thirty-one".