45525281 has 12 divisors (see below), whose sum is σ = 47857428. Its totient is φ = 43274592.

The previous prime is 45525239. The next prime is 45525283. The reversal of 45525281 is 18252554.

It can be written as a sum of positive squares in 2 ways, for example, as 22090000 + 23435281 = 4700^2 + 4841^2 .

It is not a de Polignac number, because 45525281 - 2⁶ = 45525217 is a prime.

It is a super-2 number, since 2×45525281² = 4145102420257922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45525283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81455 + ... + 82011.

It is an arithmetic number, because the mean of its divisors is an integer number (3988119).

Almost surely, 2^45525281 is an apocalyptic number.

It is an amenable number.

45525281 is a deficient number, since it is larger than the sum of its proper divisors (2332147).

45525281 is an equidigital number, since it uses as much as digits as its factorization.

45525281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 641 counting only the distinct ones).

The product of its digits is 16000, while the sum is 32.

The square root of 45525281 is about 6747.2424737814. The cubic root of 45525281 is about 357.0679567348.

The spelling of 45525281 in words is "forty-five million, five hundred twenty-five thousand, two hundred eighty-one".