45531947 has 2 divisors, whose sum is σ = 45531948. Its totient is φ = 45531946.

The previous prime is 45531877. The next prime is 45531953. The reversal of 45531947 is 74913554.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45531947 - 2¹⁰ = 45530923 is a prime.

It is a super-2 number, since 2×45531947² = 4146316395221618, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45531947.

It is not a weakly prime, because it can be changed into another prime (45531547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22765973 + 22765974.

It is an arithmetic number, because the mean of its divisors is an integer number (22765974).

Almost surely, 2^45531947 is an apocalyptic number.

45531947 is a deficient number, since it is larger than the sum of its proper divisors (1).

45531947 is an equidigital number, since it uses as much as digits as its factorization.

45531947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 45531947 is about 6747.7364352796. The cubic root of 45531947 is about 357.0853836734.

The spelling of 45531947 in words is "forty-five million, five hundred thirty-one thousand, nine hundred forty-seven".