235131621 has 16 divisors (see below), whose sum is σ = 324764160. Its totient is φ = 151162560.

The previous prime is 235131601. The next prime is 235131649. The reversal of 235131621 is 126131532.

235131621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 235131621 - 2²⁷ = 100913893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 235131591 and 235131600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235131601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22935 + ... + 31563.

It is an arithmetic number, because the mean of its divisors is an integer number (20297760).

Almost surely, 2^235131621 is an apocalyptic number.

It is an amenable number.

235131621 is a deficient number, since it is larger than the sum of its proper divisors (89632539).

235131621 is a wasteful number, since it uses less digits than its factorization.

235131621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8956.

The product of its digits is 1080, while the sum is 24.

The square root of 235131621 is about 15334.0021194729. The cubic root of 235131621 is about 617.2157682648.

The spelling of 235131621 in words is "two hundred thirty-five million, one hundred thirty-one thousand, six hundred twenty-one".