256252166 has 4 divisors (see below), whose sum is σ = 384378252. Its totient is φ = 128126082.

The previous prime is 256252151. The next prime is 256252187. The reversal of 256252166 is 661252652.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64063040 + ... + 64063043.

It is an arithmetic number, because the mean of its divisors is an integer number (96094563).

Almost surely, 2^256252166 is an apocalyptic number.

256252166 is a deficient number, since it is larger than the sum of its proper divisors (128126086).

256252166 is a wasteful number, since it uses less digits than its factorization.

256252166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128126085.

The product of its digits is 43200, while the sum is 35.

The square root of 256252166 is about 16007.8782479128. The cubic root of 256252166 is about 635.1688360031.

The spelling of 256252166 in words is "two hundred fifty-six million, two hundred fifty-two thousand, one hundred sixty-six".