45002281 has 4 divisors (see below), whose sum is σ = 47649492. Its totient is φ = 42355072.

The previous prime is 45002273. The next prime is 45002311. The reversal of 45002281 is 18220054.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42250000 + 2752281 = 6500^2 + 1659^2 .

It is a cyclic number.

It is not a de Polignac number, because 45002281 - 2³ = 45002273 is a prime.

It is a super-3 number, since 3×45002281³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45002261) 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, 1323580 + ... + 1323613.

It is an arithmetic number, because the mean of its divisors is an integer number (11912373).

Almost surely, 2^45002281 is an apocalyptic number.

It is an amenable number.

45002281 is a deficient number, since it is larger than the sum of its proper divisors (2647211).

45002281 is a wasteful number, since it uses less digits than its factorization.

45002281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647210.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 45002281 is about 6708.3739460468. The cubic root of 45002281 is about 355.6953401798.

The spelling of 45002281 in words is "forty-five million, two thousand, two hundred eighty-one".