256154061 has 4 divisors (see below), whose sum is σ = 341538752. Its totient is φ = 170769372.

The previous prime is 256154057. The next prime is 256154077. The reversal of 256154061 is 160451652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 256154061 - 2² = 256154057 is a prime.

It is a super-2 number, since 2×256154061² = 131229805933583442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256154081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42692341 + ... + 42692346.

It is an arithmetic number, because the mean of its divisors is an integer number (85384688).

Almost surely, 2^256154061 is an apocalyptic number.

It is an amenable number.

256154061 is a deficient number, since it is larger than the sum of its proper divisors (85384691).

256154061 is an equidigital number, since it uses as much as digits as its factorization.

256154061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85384690.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 256154061 is about 16004.8136821395. The cubic root of 256154061 is about 635.0877684705.

The spelling of 256154061 in words is "two hundred fifty-six million, one hundred fifty-four thousand, sixty-one".