45721181 has 8 divisors (see below), whose sum is σ = 50291328. Its totient is φ = 41563500.

The previous prime is 45721153. The next prime is 45721189. The reversal of 45721181 is 18112754.

It is not a de Polignac number, because 45721181 - 2¹⁴ = 45704797 is a prime.

It is a super-2 number, since 2×45721181² = 4180852784069522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45721189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15845 + ... + 18506.

It is an arithmetic number, because the mean of its divisors is an integer number (6286416).

Almost surely, 2^45721181 is an apocalyptic number.

It is an amenable number.

45721181 is a deficient number, since it is larger than the sum of its proper divisors (4570147).

45721181 is an equidigital number, since it uses as much as digits as its factorization.

45721181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34384 (or 34362 counting only the distinct ones).

The product of its digits is 2240, while the sum is 29.

The square root of 45721181 is about 6761.7439318566. The cubic root of 45721181 is about 357.5793906523.

The spelling of 45721181 in words is "forty-five million, seven hundred twenty-one thousand, one hundred eighty-one".