45251640 has 96 divisors (see below), whose sum is σ = 168086880. Its totient is φ = 10342656.

The previous prime is 45251623. The next prime is 45251651. The reversal of 45251640 is 4615254.

45251640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6459 + ... + 11498.

It is an arithmetic number, because the mean of its divisors is an integer number (1750905).

Almost surely, 2^45251640 is an apocalyptic number.

45251640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45251640 is an abundant number, since it is smaller than the sum of its proper divisors (122835240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45251640 is a wasteful number, since it uses less digits than its factorization.

45251640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17981 (or 17974 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 45251640 is about 6726.9339226723. The cubic root of 45251640 is about 356.3511033449.

Adding to 45251640 its reverse (4615254), we get a palindrome (49866894).

The spelling of 45251640 in words is "forty-five million, two hundred fifty-one thousand, six hundred forty".