45581971 has 2 divisors, whose sum is σ = 45581972. Its totient is φ = 45581970.

The previous prime is 45581957. The next prime is 45581983. The reversal of 45581971 is 17918554.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45581971 - 2¹³ = 45573779 is a prime.

It is not a weakly prime, because it can be changed into another prime (45581911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22790985 + 22790986.

It is an arithmetic number, because the mean of its divisors is an integer number (22790986).

Almost surely, 2^45581971 is an apocalyptic number.

45581971 is a deficient number, since it is larger than the sum of its proper divisors (1).

45581971 is an equidigital number, since it uses as much as digits as its factorization.

45581971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 40.

The square root of 45581971 is about 6751.4421422389. The cubic root of 45581971 is about 357.2161072839.

The spelling of 45581971 in words is "forty-five million, five hundred eighty-one thousand, nine hundred seventy-one".