231061145 has 16 divisors (see below), whose sum is σ = 324255360. Its totient is φ = 154756224.

The previous prime is 231061141. The next prime is 231061211. The reversal of 231061145 is 541160132.

It is not a de Polignac number, because 231061145 - 2² = 231061141 is a prime.

It is a super-2 number, since 2×231061145² = 106778505457422050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231061145.

It is not an unprimeable number, because it can be changed into a prime (231061141) 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, 75260 + ... + 78269.

It is an arithmetic number, because the mean of its divisors is an integer number (20265960).

Almost surely, 2^231061145 is an apocalyptic number.

It is an amenable number.

231061145 is a deficient number, since it is larger than the sum of its proper divisors (93194215).

231061145 is a wasteful number, since it uses less digits than its factorization.

231061145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153584.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 231061145 is about 15200.6955432967. The cubic root of 231061145 is about 613.6333767124.

The spelling of 231061145 in words is "two hundred thirty-one million, sixty-one thousand, one hundred forty-five".