45227781 has 16 divisors (see below), whose sum is σ = 67950720. Its totient is φ = 29725920.

The previous prime is 45227719. The next prime is 45227783. The reversal of 45227781 is 18772254.

It is not a de Polignac number, because 45227781 - 2¹⁰ = 45226757 is a prime.

It is a super-2 number, since 2×45227781² = 4091104348367922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45227783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9880 + ... + 13713.

It is an arithmetic number, because the mean of its divisors is an integer number (4246920).

Almost surely, 2^45227781 is an apocalyptic number.

It is an amenable number.

45227781 is a deficient number, since it is larger than the sum of its proper divisors (22722939).

45227781 is a wasteful number, since it uses less digits than its factorization.

45227781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23673 (or 23667 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 45227781 is about 6725.1602954874. The cubic root of 45227781 is about 356.2884634371.

The spelling of 45227781 in words is "forty-five million, two hundred twenty-seven thousand, seven hundred eighty-one".