45647281 has 4 divisors (see below), whose sum is σ = 45886464. Its totient is φ = 45408100.

The previous prime is 45647269. The next prime is 45647317. The reversal of 45647281 is 18274654.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45647281 - 2²⁵ = 12092849 is a prime.

It is a super-2 number, since 2×45647281² = 4167348525385922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45647281.

It is not an unprimeable number, because it can be changed into a prime (45647201) 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, 119305 + ... + 119686.

It is an arithmetic number, because the mean of its divisors is an integer number (11471616).

Almost surely, 2^45647281 is an apocalyptic number.

It is an amenable number.

45647281 is a deficient number, since it is larger than the sum of its proper divisors (239183).

45647281 is a wasteful number, since it uses less digits than its factorization.

45647281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239182.

The product of its digits is 53760, while the sum is 37.

The square root of 45647281 is about 6756.2771553571. The cubic root of 45647281 is about 357.3866326765.

The spelling of 45647281 in words is "forty-five million, six hundred forty-seven thousand, two hundred eighty-one".