45281881 has 4 divisors (see below), whose sum is σ = 46334992. Its totient is φ = 44228772.

The previous prime is 45281879. The next prime is 45281893. The reversal of 45281881 is 18818254.

It is a happy number.

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 45281881 - 2¹ = 45281879 is a prime.

It is a super-2 number, since 2×45281881² = 4100897493796322, 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 45281881.

It is not an unprimeable number, because it can be changed into a prime (45281801) 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, 526491 + ... + 526576.

It is an arithmetic number, because the mean of its divisors is an integer number (11583748).

Almost surely, 2^45281881 is an apocalyptic number.

It is an amenable number.

45281881 is a deficient number, since it is larger than the sum of its proper divisors (1053111).

45281881 is a wasteful number, since it uses less digits than its factorization.

45281881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053110.

The product of its digits is 20480, while the sum is 37.

The square root of 45281881 is about 6729.1813023577. The cubic root of 45281881 is about 356.4304670544.

The spelling of 45281881 in words is "forty-five million, two hundred eighty-one thousand, eight hundred eighty-one".