256511132 has 6 divisors (see below), whose sum is σ = 448894488. Its totient is φ = 128255564.

The previous prime is 256511053. The next prime is 256511221. The reversal of 256511132 is 231115652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32063888 + ... + 32063895.

It is an arithmetic number, because the mean of its divisors is an integer number (74815748).

Almost surely, 2^256511132 is an apocalyptic number.

It is an amenable number.

256511132 is a deficient number, since it is larger than the sum of its proper divisors (192383356).

256511132 is a wasteful number, since it uses less digits than its factorization.

256511132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64127787 (or 64127785 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 256511132 is about 16015.9649100515. The cubic root of 256511132 is about 635.3827291599.

Adding to 256511132 its reverse (231115652), we get a palindrome (487626784).

The spelling of 256511132 in words is "two hundred fifty-six million, five hundred eleven thousand, one hundred thirty-two".