231406157 has 4 divisors (see below), whose sum is σ = 231513216. Its totient is φ = 231299100.

The previous prime is 231406127. The next prime is 231406169. The reversal of 231406157 is 751604132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231406157 - 2⁶ = 231406093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231406117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50219 + ... + 54632.

It is an arithmetic number, because the mean of its divisors is an integer number (57878304).

Almost surely, 2^231406157 is an apocalyptic number.

It is an amenable number.

231406157 is a deficient number, since it is larger than the sum of its proper divisors (107059).

231406157 is a wasteful number, since it uses less digits than its factorization.

231406157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107058.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 231406157 is about 15212.0398697874. The cubic root of 231406157 is about 613.9386430853.

The spelling of 231406157 in words is "two hundred thirty-one million, four hundred six thousand, one hundred fifty-seven".