256197130 has 16 divisors (see below), whose sum is σ = 527034240. Its totient is φ = 87838992.

The previous prime is 256197101. The next prime is 256197143. The reversal of 256197130 is 31791652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1829910 + ... + 1830049.

It is an arithmetic number, because the mean of its divisors is an integer number (32939640).

Almost surely, 2^256197130 is an apocalyptic number.

256197130 is an abundant number, since it is smaller than the sum of its proper divisors (270837110).

256197130 is a wasteful number, since it uses less digits than its factorization.

256197130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659973.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 256197130 is about 16006.1591270361. The cubic root of 256197130 is about 635.1233604135.

The spelling of 256197130 in words is "two hundred fifty-six million, one hundred ninety-seven thousand, one hundred thirty".