256330534 has 4 divisors (see below), whose sum is σ = 384495804. Its totient is φ = 128165266.

The previous prime is 256330513. The next prime is 256330541. The reversal of 256330534 is 435033652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 256330496 and 256330505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64082632 + ... + 64082635.

It is an arithmetic number, because the mean of its divisors is an integer number (96123951).

Almost surely, 2^256330534 is an apocalyptic number.

256330534 is a deficient number, since it is larger than the sum of its proper divisors (128165270).

256330534 is a wasteful number, since it uses less digits than its factorization.

256330534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128165269.

The product of its (nonzero) digits is 32400, while the sum is 31.

The square root of 256330534 is about 16010.3258555221. The cubic root of 256330534 is about 635.2335793100.

The spelling of 256330534 in words is "two hundred fifty-six million, three hundred thirty thousand, five hundred thirty-four".