231060661 has 16 divisors (see below), whose sum is σ = 258073200. Its totient is φ = 205406208.

The previous prime is 231060649. The next prime is 231060677. The reversal of 231060661 is 166060132.

It can be written as a sum of positive squares in 8 ways, for example, as 13645636 + 217415025 = 3694^2 + 14745^2 .

It is a cyclic number.

It is not a de Polignac number, because 231060661 - 2²³ = 222672053 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 (231064661) 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, 289515 + ... + 290311.

It is an arithmetic number, because the mean of its divisors is an integer number (16129575).

Almost surely, 2^231060661 is an apocalyptic number.

It is an amenable number.

231060661 is a deficient number, since it is larger than the sum of its proper divisors (27012539).

231060661 is a wasteful number, since it uses less digits than its factorization.

231060661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 231060661 is about 15200.6796229642. The cubic root of 231060661 is about 613.6329482562.

The spelling of 231060661 in words is "two hundred thirty-one million, sixty thousand, six hundred sixty-one".