231061400 has 72 divisors (see below), whose sum is σ = 549940620. Its totient is φ = 90285120.

The previous prime is 231061379. The next prime is 231061409. The reversal of 231061400 is 4160132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231061409) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 441539 + ... + 442061.

Almost surely, 2^231061400 is an apocalyptic number.

231061400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231061400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274970310).

231061400 is an abundant number, since it is smaller than the sum of its proper divisors (318879220).

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

231061400 is a wasteful number, since it uses less digits than its factorization.

231061400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 231061400 is about 15200.7039310685. The cubic root of 231061400 is about 613.6336024484.

The spelling of 231061400 in words is "two hundred thirty-one million, sixty-one thousand, four hundred".