231898437 has 8 divisors (see below), whose sum is σ = 343553280. Its totient is φ = 154598940.

The previous prime is 231898421. The next prime is 231898463. The reversal of 231898437 is 734898132.

It is not a de Polignac number, because 231898437 - 2⁴ = 231898421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231898392 and 231898401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231890437) 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, 4294389 + ... + 4294442.

It is an arithmetic number, because the mean of its divisors is an integer number (42944160).

Almost surely, 2^231898437 is an apocalyptic number.

231898437 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

231898437 is a deficient number, since it is larger than the sum of its proper divisors (111654843).

231898437 is an equidigital number, since it uses as much as digits as its factorization.

231898437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8588840 (or 8588834 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 231898437 is about 15228.2118779586. The cubic root of 231898437 is about 614.3736871895.

It can be divided in two parts, 23189 and 8437, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 231898437 in words is "two hundred thirty-one million, eight hundred ninety-eight thousand, four hundred thirty-seven".