256195542 has 16 divisors (see below), whose sum is σ = 542531952. Its totient is φ = 80375040.

The previous prime is 256195529. The next prime is 256195549. The reversal of 256195542 is 245591652.

It is a self number, because there is not a number n which added to its sum of digits gives 256195542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256195549) 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 7 ways as a sum of consecutive naturals, for example, 1255759 + ... + 1255962.

It is an arithmetic number, because the mean of its divisors is an integer number (33908247).

Almost surely, 2^256195542 is an apocalyptic number.

256195542 is an abundant number, since it is smaller than the sum of its proper divisors (286336410).

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

256195542 is a wasteful number, since it uses less digits than its factorization.

256195542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511743.

The product of its digits is 108000, while the sum is 39.

The square root of 256195542 is about 16006.1095210548. The cubic root of 256195542 is about 635.1220481714.

The spelling of 256195542 in words is "two hundred fifty-six million, one hundred ninety-five thousand, five hundred forty-two".