256133132 has 12 divisors (see below), whose sum is σ = 449437296. Its totient is φ = 127722480.

The previous prime is 256133131. The next prime is 256133149. The reversal of 256133132 is 231331652.

It is not an unprimeable number, because it can be changed into a prime (256133131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84344 + ... + 87327.

It is an arithmetic number, because the mean of its divisors is an integer number (37453108).

Almost surely, 2^256133132 is an apocalyptic number.

It is an amenable number.

256133132 is a deficient number, since it is larger than the sum of its proper divisors (193304164).

256133132 is a wasteful number, since it uses less digits than its factorization.

256133132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172048 (or 172046 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 256133132 is about 16004.1598342431. The cubic root of 256133132 is about 635.0704714398.

Adding to 256133132 its reverse (231331652), we get a palindrome (487464784).

The spelling of 256133132 in words is "two hundred fifty-six million, one hundred thirty-three thousand, one hundred thirty-two".