45131240 has 64 divisors (see below), whose sum is σ = 126610560. Its totient is φ = 14065920.

The previous prime is 45131237. The next prime is 45131291. The reversal of 45131240 is 4213154.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4247 + ... + 10406.

It is an arithmetic number, because the mean of its divisors is an integer number (1978290).

Almost surely, 2^45131240 is an apocalyptic number.

45131240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45131240 is an abundant number, since it is smaller than the sum of its proper divisors (81479320).

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

45131240 is a wasteful number, since it uses less digits than its factorization.

45131240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14682 (or 14678 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 45131240 is about 6717.9788627235. The cubic root of 45131240 is about 356.0347775645.

Adding to 45131240 its reverse (4213154), we get a palindrome (49344394).

The spelling of 45131240 in words is "forty-five million, one hundred thirty-one thousand, two hundred forty".