231401436 has 48 divisors (see below), whose sum is σ = 643905024. Its totient is φ = 63239616.

The previous prime is 231401431. The next prime is 231401449. The reversal of 231401436 is 634104132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231401431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57955 + ... + 61818.

It is an arithmetic number, because the mean of its divisors is an integer number (13414688).

Almost surely, 2^231401436 is an apocalyptic number.

It is an amenable number.

231401436 is an abundant number, since it is smaller than the sum of its proper divisors (412503588).

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

231401436 is a wasteful number, since it uses less digits than its factorization.

231401436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119810 (or 119808 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 231401436 is about 15211.8846958554. The cubic root of 231401436 is about 613.9344679960.

Adding to 231401436 its reverse (634104132), we get a palindrome (865505568).

The spelling of 231401436 in words is "two hundred thirty-one million, four hundred one thousand, four hundred thirty-six".