256153061 has 2 divisors, whose sum is σ = 256153062. Its totient is φ = 256153060.

The previous prime is 256153057. The next prime is 256153063. The reversal of 256153061 is 160351652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196168036 + 59985025 = 14006^2 + 7745^2 .

It is a cyclic number.

It is not a de Polignac number, because 256153061 - 2² = 256153057 is a prime.

It is a super-2 number, since 2×256153061² = 131228781319339442, which contains 22 as substring.

Together with 256153063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256153063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128076530 + 128076531.

It is an arithmetic number, because the mean of its divisors is an integer number (128076531).

Almost surely, 2^256153061 is an apocalyptic number.

It is an amenable number.

256153061 is a deficient number, since it is larger than the sum of its proper divisors (1).

256153061 is an equidigital number, since it uses as much as digits as its factorization.

256153061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 256153061 is about 16004.7824415079. The cubic root of 256153061 is about 635.0869420296.

The spelling of 256153061 in words is "two hundred fifty-six million, one hundred fifty-three thousand, sixty-one".