2451253440 has 56 divisors (see below), whose sum is σ = 7782732720. Its totient is φ = 653667328.

The previous prime is 2451253439. The next prime is 2451253499. The reversal of 2451253440 is 443521542.

It is a super-2 number, since 2×2451253440² = 12017286854223667200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2451253398 and 2451253407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275735 + ... + 1277654.

It is an arithmetic number, because the mean of its divisors is an integer number (138977370).

Almost surely, 2^2451253440 is an apocalyptic number.

2451253440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2451253440 is an abundant number, since it is smaller than the sum of its proper divisors (5331479280).

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

2451253440 is a wasteful number, since it uses less digits than its factorization.

2451253440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553409 (or 2553399 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 2451253440 is about 49510.1347200752. The cubic root of 2451253440 is about 1348.3296103052.

Adding to 2451253440 its reverse (443521542), we get a palindrome (2894774982).

The spelling of 2451253440 in words is "two billion, four hundred fifty-one million, two hundred fifty-three thousand, four hundred forty".