45199281 has 4 divisors (see below), whose sum is σ = 60265712. Its totient is φ = 30132852.

The previous prime is 45199267. The next prime is 45199291. The reversal of 45199281 is 18299154.

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 de Polignac number, because none of the positive numbers 2^k-45199281 is a prime.

It is a super-2 number, since 2×45199281² = 4085950005833922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45199211) 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, 7533211 + ... + 7533216.

It is an arithmetic number, because the mean of its divisors is an integer number (15066428).

Almost surely, 2^45199281 is an apocalyptic number.

It is an amenable number.

45199281 is a deficient number, since it is larger than the sum of its proper divisors (15066431).

45199281 is a wasteful number, since it uses less digits than its factorization.

45199281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15066430.

The product of its digits is 25920, while the sum is 39.

The square root of 45199281 is about 6723.0410529760. The cubic root of 45199281 is about 356.2136100719.

The spelling of 45199281 in words is "forty-five million, one hundred ninety-nine thousand, two hundred eighty-one".