256223132 has 48 divisors (see below), whose sum is σ = 525934080. Its totient is φ = 107971200.

The previous prime is 256223131. The next prime is 256223137. The reversal of 256223132 is 231322652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256223131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36032 + ... + 42552.

It is an arithmetic number, because the mean of its divisors is an integer number (10956960).

Almost surely, 2^256223132 is an apocalyptic number.

256223132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256223132 is an abundant number, since it is smaller than the sum of its proper divisors (269710948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256223132 is a wasteful number, since it uses less digits than its factorization.

256223132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6602 (or 6600 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 256223132 is about 16006.9713562560. The cubic root of 256223132 is about 635.1448463671.

Adding to 256223132 its reverse (231322652), we get a palindrome (487545784).

The spelling of 256223132 in words is "two hundred fifty-six million, two hundred twenty-three thousand, one hundred thirty-two".