231436532166 has 384 divisors, whose sum is σ = 603646525440. Its totient is φ = 58732128000.

The previous prime is 231436532141. The next prime is 231436532269. The reversal of 231436532166 is 661235634132.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1385847415 + ... + 1385847581.

It is an arithmetic number, because the mean of its divisors is an integer number (1571996160).

Almost surely, 2^231436532166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231436532166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301823262720).

231436532166 is an abundant number, since it is smaller than the sum of its proper divisors (372209993274).

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

231436532166 is a wasteful number, since it uses less digits than its factorization.

231436532166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 433 counting only the distinct ones).

The product of its digits is 466560, while the sum is 42.

The spelling of 231436532166 in words is "two hundred thirty-one billion, four hundred thirty-six million, five hundred thirty-two thousand, one hundred sixty-six".