45249481 has 4 divisors (see below), whose sum is σ = 45332752. Its totient is φ = 45166212.

The previous prime is 45249419. The next prime is 45249493. The reversal of 45249481 is 18494254.

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 45249481 - 2⁷ = 45249353 is a prime.

It is a super-2 number, since 2×45249481² = 4095031061538722, 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 45249481.

It is not an unprimeable number, because it can be changed into a prime (45243481) 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, 40815 + ... + 41908.

It is an arithmetic number, because the mean of its divisors is an integer number (11333188).

Almost surely, 2^45249481 is an apocalyptic number.

It is an amenable number.

45249481 is a deficient number, since it is larger than the sum of its proper divisors (83271).

45249481 is an equidigital number, since it uses as much as digits as its factorization.

45249481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83270.

The product of its digits is 46080, while the sum is 37.

The square root of 45249481 is about 6726.7734464600. The cubic root of 45249481 is about 356.3454359682.

The spelling of 45249481 in words is "forty-five million, two hundred forty-nine thousand, four hundred eighty-one".