256196145 has 16 divisors (see below), whose sum is σ = 410287680. Its totient is φ = 136513344.

The previous prime is 256196071. The next prime is 256196147. The reversal of 256196145 is 541691652.

It is not a de Polignac number, because 256196145 - 2¹⁴ = 256179761 is a prime.

It is a super-2 number, since 2×256196145² = 131272929425722050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256196147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10611 + ... + 24999.

It is an arithmetic number, because the mean of its divisors is an integer number (25642980).

Almost surely, 2^256196145 is an apocalyptic number.

It is an amenable number.

256196145 is a deficient number, since it is larger than the sum of its proper divisors (154091535).

256196145 is a wasteful number, since it uses less digits than its factorization.

256196145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15584.

The product of its digits is 64800, while the sum is 39.

The square root of 256196145 is about 16006.1283576010. The cubic root of 256196145 is about 635.1225464605.

The spelling of 256196145 in words is "two hundred fifty-six million, one hundred ninety-six thousand, one hundred forty-five".