2154531 has 8 divisors (see below), whose sum is σ = 2965504. Its totient is φ = 1389960.

The previous prime is 2154499. The next prime is 2154533. The reversal of 2154531 is 1354512.

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

It is not a de Polignac number, because 2154531 - 2⁵ = 2154499 is a prime.

It is a super-2 number, since 2×2154531² = 9284007659922, 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 = 2154498 and 2154507.

It is not an unprimeable number, because it can be changed into a prime (2154533) 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, 11491 + ... + 11676.

It is an arithmetic number, because the mean of its divisors is an integer number (370688).

2^2154531 is an apocalyptic number.

2154531 is a deficient number, since it is larger than the sum of its proper divisors (810973).

2154531 is a wasteful number, since it uses less digits than its factorization.

2154531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23201.

The product of its digits is 600, while the sum is 21.

The square root of 2154531 is about 1467.8320748642. The cubic root of 2154531 is about 129.1568910164.

The spelling of 2154531 in words is "two million, one hundred fifty-four thousand, five hundred thirty-one".