2131553 has 8 divisors (see below), whose sum is σ = 2296800. Its totient is φ = 1971648.

The previous prime is 2131541. The next prime is 2131559. The reversal of 2131553 is 3551312.

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 2131553 - 2⁴ = 2131537 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488 + ... + 2121.

It is an arithmetic number, because the mean of its divisors is an integer number (287100).

2^2131553 is an apocalyptic number.

It is an amenable number.

2131553 is a deficient number, since it is larger than the sum of its proper divisors (165247).

2131553 is a wasteful number, since it uses less digits than its factorization.

2131553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671.

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

The square root of 2131553 is about 1459.9839040209. The cubic root of 2131553 is about 128.6960977117.

Adding to 2131553 its reverse (3551312), we get a palindrome (5682865).

The spelling of 2131553 in words is "two million, one hundred thirty-one thousand, five hundred fifty-three".