2345531 has 4 divisors (see below), whose sum is σ = 2469000. Its totient is φ = 2222064.

The previous prime is 2345509. The next prime is 2345533. The reversal of 2345531 is 1355432.

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

It is a cyclic number.

It is not a de Polignac number, because 2345531 - 2¹⁴ = 2329147 is a prime.

It is a super-2 number, since 2×2345531² = 11003031343922, 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 = 2345497 and 2345506.

It is not an unprimeable number, because it can be changed into a prime (2345533) 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, 61706 + ... + 61743.

It is an arithmetic number, because the mean of its divisors is an integer number (617250).

2^2345531 is an apocalyptic number.

2345531 is a deficient number, since it is larger than the sum of its proper divisors (123469).

2345531 is a wasteful number, since it uses less digits than its factorization.

2345531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123468.

The product of its digits is 1800, while the sum is 23.

The square root of 2345531 is about 1531.5126509435. The cubic root of 2345531 is about 132.8659587607.

Subtracting from 2345531 its reverse (1355432), we obtain a palindrome (990099).

It can be divided in two parts, 23 and 45531, that added together give a palindrome (45554).

The spelling of 2345531 in words is "two million, three hundred forty-five thousand, five hundred thirty-one".