2551513 has 4 divisors (see below), whose sum is σ = 2701620. Its totient is φ = 2401408.

The previous prime is 2551511. The next prime is 2551531. The reversal of 2551513 is 3151552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 994009 + 1557504 = 997^2 + 1248^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551513 - 2¹ = 2551511 is a prime.

It is an Ulam number.

It is a Duffinian number.

2551513 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2551511) 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, 75028 + ... + 75061.

It is an arithmetic number, because the mean of its divisors is an integer number (675405).

2^2551513 is an apocalyptic number.

It is an amenable number.

2551513 is a deficient number, since it is larger than the sum of its proper divisors (150107).

2551513 is a wasteful number, since it uses less digits than its factorization.

2551513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150106.

The product of its digits is 750, while the sum is 22.

The square root of 2551513 is about 1597.3456106929. The cubic root of 2551513 is about 136.6467358072.

The spelling of 2551513 in words is "two million, five hundred fifty-one thousand, five hundred thirteen".