231402154 has 8 divisors (see below), whose sum is σ = 347431140. Its totient is φ = 115591776.

The previous prime is 231402151. The next prime is 231402163. The reversal of 231402154 is 451204132.

It can be written as a sum of positive squares in 2 ways, for example, as 228826129 + 2576025 = 15127^2 + 1605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (231402151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51979 + ... + 56254.

Almost surely, 2^231402154 is an apocalyptic number.

231402154 is a deficient number, since it is larger than the sum of its proper divisors (116028986).

231402154 is a wasteful number, since it uses less digits than its factorization.

231402154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109304.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 231402154 is about 15211.9082958056. The cubic root of 231402154 is about 613.9351029741.

Adding to 231402154 its reverse (451204132), we get a palindrome (682606286).

The spelling of 231402154 in words is "two hundred thirty-one million, four hundred two thousand, one hundred fifty-four".