231987606 has 16 divisors (see below), whose sum is σ = 488395200. Its totient is φ = 73259208.

The previous prime is 231987599. The next prime is 231987641. The reversal of 231987606 is 606789132.

It is a happy number.

It is a super-2 number, since 2×231987606² = 107636498675222472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1017376 + ... + 1017603.

It is an arithmetic number, because the mean of its divisors is an integer number (30524700).

Almost surely, 2^231987606 is an apocalyptic number.

231987606 is an abundant number, since it is smaller than the sum of its proper divisors (256407594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231987606 is a wasteful number, since it uses less digits than its factorization.

231987606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035003.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 231987606 is about 15231.1393533117. The cubic root of 231987606 is about 614.4524229036.

The spelling of 231987606 in words is "two hundred thirty-one million, nine hundred eighty-seven thousand, six hundred six".