256101237 has 32 divisors (see below), whose sum is σ = 434453760. Its totient is φ = 146059200.

The previous prime is 256101227. The next prime is 256101257. The reversal of 256101237 is 732101652.

It is a happy number.

256101237 is a `hidden beast` number, since 2 + 5 + 610 + 12 + 37 = 666.

It is not a de Polignac number, because 256101237 - 2⁴ = 256101221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 256101237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256101217) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 131523 + ... + 133455.

It is an arithmetic number, because the mean of its divisors is an integer number (13576680).

Almost surely, 2^256101237 is an apocalyptic number.

256101237 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

256101237 is a deficient number, since it is larger than the sum of its proper divisors (178352523).

256101237 is a wasteful number, since it uses less digits than its factorization.

256101237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650 (or 2644 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 256101237 is about 16003.1633435393. The cubic root of 256101237 is about 635.0441096108.

Adding to 256101237 its reverse (732101652), we get a palindrome (988202889).

The spelling of 256101237 in words is "two hundred fifty-six million, one hundred one thousand, two hundred thirty-seven".