231770238 has 16 divisors (see below), whose sum is σ = 529760640. Its totient is φ = 66220056.

The previous prime is 231770237. The next prime is 231770263. The reversal of 231770238 is 832077132.

231770238 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231770199 and 231770208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231770237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2759128 + ... + 2759211.

It is an arithmetic number, because the mean of its divisors is an integer number (33110040).

Almost surely, 2^231770238 is an apocalyptic number.

231770238 is an abundant number, since it is smaller than the sum of its proper divisors (297990402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231770238 is a wasteful number, since it uses less digits than its factorization.

231770238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5518351.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 231770238 is about 15224.0020362584. The cubic root of 231770238 is about 614.2604528333.

The spelling of 231770238 in words is "two hundred thirty-one million, seven hundred seventy thousand, two hundred thirty-eight".