2153431 has 4 divisors (see below), whose sum is σ = 2461072. Its totient is φ = 1845792.

The previous prime is 2153429. The next prime is 2153449. The reversal of 2153431 is 1343512.

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 2153431 - 2¹ = 2153429 is a prime.

It is a super-2 number, since 2×2153431² = 9274530143522, 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 = 2153399 and 2153408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153810 + ... + 153823.

It is an arithmetic number, because the mean of its divisors is an integer number (615268).

2^2153431 is an apocalyptic number.

2153431 is a deficient number, since it is larger than the sum of its proper divisors (307641).

2153431 is an equidigital number, since it uses as much as digits as its factorization.

2153431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307640.

The product of its digits is 360, while the sum is 19.

The square root of 2153431 is about 1467.4573247628. The cubic root of 2153431 is about 129.1349068405.

Adding to 2153431 its reverse (1343512), we get a palindrome (3496943).

The spelling of 2153431 in words is "two million, one hundred fifty-three thousand, four hundred thirty-one".