231033402 has 48 divisors (see below), whose sum is σ = 516447360. Its totient is φ = 74588256.

The previous prime is 231033391. The next prime is 231033419. The reversal of 231033402 is 204330132.

231033402 is a `hidden beast` number, since 231 + 0 + 33 + 402 = 666.

231033402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174499 + ... + 175817.

It is an arithmetic number, because the mean of its divisors is an integer number (10759320).

Almost surely, 2^231033402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231033402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258223680).

231033402 is an abundant number, since it is smaller than the sum of its proper divisors (285413958).

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

231033402 is a wasteful number, since it uses less digits than its factorization.

231033402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627 (or 1624 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 231033402 is about 15199.7829589767. The cubic root of 231033402 is about 613.6088165292.

Adding to 231033402 its reverse (204330132), we get a palindrome (435363534).

The spelling of 231033402 in words is "two hundred thirty-one million, thirty-three thousand, four hundred two".