2251531 has 8 divisors (see below), whose sum is σ = 2466720. Its totient is φ = 2045568.

The previous prime is 2251517. The next prime is 2251547. The reversal of 2251531 is 1351522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2251531 - 2¹¹ = 2249483 is a prime.

It is a super-2 number, since 2×2251531² = 10138783687922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2251499 and 2251508.

It is not an unprimeable number, because it can be changed into a prime (2251511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1791 + ... + 2776.

It is an arithmetic number, because the mean of its divisors is an integer number (308340).

2^2251531 is an apocalyptic number.

2251531 is a deficient number, since it is larger than the sum of its proper divisors (215189).

2251531 is a wasteful number, since it uses less digits than its factorization.

2251531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4613.

The product of its digits is 300, while the sum is 19.

The square root of 2251531 is about 1500.5102465495. The cubic root of 2251531 is about 131.0667841205.

Subtracting from 2251531 its reverse (1351522), we obtain a palindrome (900009).

The spelling of 2251531 in words is "two million, two hundred fifty-one thousand, five hundred thirty-one".