235725021 has 24 divisors (see below), whose sum is σ = 402554880. Its totient is φ = 130054176.

The previous prime is 235725013. The next prime is 235725047. The reversal of 235725021 is 120527532.

235725021 is a `hidden beast` number, since 23 + 572 + 50 + 21 = 666.

235725021 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 235725021 - 2³ = 235725013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235725121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62685 + ... + 66338.

It is an arithmetic number, because the mean of its divisors is an integer number (16773120).

Almost surely, 2^235725021 is an apocalyptic number.

235725021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

235725021 is a deficient number, since it is larger than the sum of its proper divisors (166829859).

235725021 is a wasteful number, since it uses less digits than its factorization.

235725021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129065 (or 129062 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 235725021 is about 15353.3390830790. The cubic root of 235725021 is about 617.7345531066.

The spelling of 235725021 in words is "two hundred thirty-five million, seven hundred twenty-five thousand, twenty-one".