2551331 has 4 divisors (see below), whose sum is σ = 2633664. Its totient is φ = 2469000.

The previous prime is 2551313. The next prime is 2551349. The reversal of 2551331 is 1331552.

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

It is an interprime number because it is at equal distance from previous prime (2551313) and next prime (2551349).

It is a cyclic number.

It is not a de Polignac number, because 2551331 - 2¹⁴ = 2534947 is a prime.

It is a super-2 number, since 2×2551331² = 13018579743122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551531) 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, 41120 + ... + 41181.

It is an arithmetic number, because the mean of its divisors is an integer number (658416).

2^2551331 is an apocalyptic number.

2551331 is a deficient number, since it is larger than the sum of its proper divisors (82333).

2551331 is an equidigital number, since it uses as much as digits as its factorization.

2551331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82332.

The product of its digits is 450, while the sum is 20.

The square root of 2551331 is about 1597.2886401650. The cubic root of 2551331 is about 136.6434867158.

Adding to 2551331 its reverse (1331552), we get a palindrome (3882883).

It can be divided in two parts, 2551 and 331, that added together give a palindrome (2882).

The spelling of 2551331 in words is "two million, five hundred fifty-one thousand, three hundred thirty-one".