231295138734 has 64 divisors (see below), whose sum is σ = 511792761600. Its totient is φ = 69097432320.

The previous prime is 231295138733. The next prime is 231295138747. The reversal of 231295138734 is 437831592132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231295138733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11731617 + ... + 11751315.

It is an arithmetic number, because the mean of its divisors is an integer number (7996761900).

Almost surely, 2^231295138734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231295138734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255896380800).

231295138734 is an abundant number, since it is smaller than the sum of its proper divisors (280497622866).

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

231295138734 is a wasteful number, since it uses less digits than its factorization.

231295138734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22225.

The product of its digits is 1088640, while the sum is 48.

The spelling of 231295138734 in words is "two hundred thirty-one billion, two hundred ninety-five million, one hundred thirty-eight thousand, seven hundred thirty-four".