231617145 has 16 divisors (see below), whose sum is σ = 372183552. Its totient is φ = 122997120.

The previous prime is 231617137. The next prime is 231617149. The reversal of 231617145 is 541716132.

It is not a de Polignac number, because 231617145 - 2³ = 231617137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231617149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29641 + ... + 36630.

It is an arithmetic number, because the mean of its divisors is an integer number (23261472).

Almost surely, 2^231617145 is an apocalyptic number.

It is an amenable number.

231617145 is a deficient number, since it is larger than the sum of its proper divisors (140566407).

231617145 is a wasteful number, since it uses less digits than its factorization.

231617145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66512.

The product of its digits is 5040, while the sum is 30.

The square root of 231617145 is about 15218.9731913819. The cubic root of 231617145 is about 614.1251756304.

The spelling of 231617145 in words is "two hundred thirty-one million, six hundred seventeen thousand, one hundred forty-five".