2551344240 has 80 divisors (see below), whose sum is σ = 8077483008. Its totient is φ = 665879808.

The previous prime is 2551344227. The next prime is 2551344251. The reversal of 2551344240 is 424431552.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 2551344198 and 2551344207.

It is a congruent number.

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, 101812 + ... + 124371.

Almost surely, 2^2551344240 is an apocalyptic number.

2551344240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551344240 is an abundant number, since it is smaller than the sum of its proper divisors (5526138768).

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

2551344240 is a wasteful number, since it uses less digits than its factorization.

2551344240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226246 (or 226240 counting only the distinct ones).

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

The square root of 2551344240 is about 50510.8328975082. The cubic root of 2551344240 is about 1366.4372308348.

Adding to 2551344240 its reverse (424431552), we get a palindrome (2975775792).

The spelling of 2551344240 in words is "two billion, five hundred fifty-one million, three hundred forty-four thousand, two hundred forty".