45477281 has 4 divisors (see below), whose sum is σ = 45918912. Its totient is φ = 45035652.

The previous prime is 45477239. The next prime is 45477283. The reversal of 45477281 is 18277454.

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 a de Polignac number, because none of the positive numbers 2^k-45477281 is a prime.

It is a super-2 number, since 2×45477281² = 4136366174305922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45477283) 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, 220661 + ... + 220866.

It is an arithmetic number, because the mean of its divisors is an integer number (11479728).

Almost surely, 2^45477281 is an apocalyptic number.

It is an amenable number.

45477281 is a deficient number, since it is larger than the sum of its proper divisors (441631).

45477281 is a wasteful number, since it uses less digits than its factorization.

45477281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441630.

The product of its digits is 62720, while the sum is 38.

The square root of 45477281 is about 6743.6845270223. The cubic root of 45477281 is about 356.9424199728.

The spelling of 45477281 in words is "forty-five million, four hundred seventy-seven thousand, two hundred eighty-one".