231542334 has 64 divisors (see below), whose sum is σ = 550126080. Its totient is φ = 72008640.

The previous prime is 231542323. The next prime is 231542347. The reversal of 231542334 is 433245132.

231542334 is a `hidden beast` number, since 231 + 5 + 423 + 3 + 4 = 666.

It is a super-2 number, since 2×231542334² = 107223704868335112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231542298 and 231542307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48649 + ... + 53195.

It is an arithmetic number, because the mean of its divisors is an integer number (8595720).

Almost surely, 2^231542334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231542334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275063040).

231542334 is an abundant number, since it is smaller than the sum of its proper divisors (318583746).

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

231542334 is a wasteful number, since it uses less digits than its factorization.

231542334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4622 (or 4616 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 231542334 is about 15216.5151726668. The cubic root of 231542334 is about 614.0590488822.

Adding to 231542334 its reverse (433245132), we get a palindrome (664787466).

The spelling of 231542334 in words is "two hundred thirty-one million, five hundred forty-two thousand, three hundred thirty-four".