256151523 has 8 divisors (see below), whose sum is σ = 345373200. Its totient is φ = 168848768.

The previous prime is 256151513. The next prime is 256151527. The reversal of 256151523 is 325151652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256151523 - 2⁶ = 256151459 is a prime.

It is a super-2 number, since 2×256151523² = 131227205470439058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256151527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479418 + ... + 479951.

It is an arithmetic number, because the mean of its divisors is an integer number (43171650).

Almost surely, 2^256151523 is an apocalyptic number.

256151523 is a deficient number, since it is larger than the sum of its proper divisors (89221677).

256151523 is an equidigital number, since it uses as much as digits as its factorization.

256151523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959461.

The product of its digits is 9000, while the sum is 30.

The square root of 256151523 is about 16004.7343932975. The cubic root of 256151523 is about 635.0856709592.

The spelling of 256151523 in words is "two hundred fifty-six million, one hundred fifty-one thousand, five hundred twenty-three".