231428018250 has 576 divisors, whose sum is σ = 773231816448. Its totient is φ = 49519008000.

The previous prime is 231428018221. The next prime is 231428018257. The reversal of 231428018250 is 52810824132.

It is a happy number.

231428018250 is a `hidden beast` number, since 2 + 3 + 1 + 428 + 0 + 182 + 50 = 666.

It is a super-2 number, since 2×231428018250² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231428018257) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 81401329 + ... + 81404171.

It is an arithmetic number, because the mean of its divisors is an integer number (1342416348).

Almost surely, 2^231428018250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231428018250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386615908224).

231428018250 is an abundant number, since it is smaller than the sum of its proper divisors (541803798198).

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

231428018250 is a wasteful number, since it uses less digits than its factorization.

231428018250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2924 (or 2900 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 231428018250 in words is "two hundred thirty-one billion, four hundred twenty-eight million, eighteen thousand, two hundred fifty".