321256233 has 16 divisors (see below), whose sum is σ = 486063360. Its totient is φ = 209613168.

The previous prime is 321256213. The next prime is 321256241. The reversal of 321256233 is 332652123.

321256233 is a `hidden beast` number, since 32 + 1 + 2 + 5 + 623 + 3 = 666.

It is not a de Polignac number, because 321256233 - 2¹³ = 321248041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 321256197 and 321256206.

It is not an unprimeable number, because it can be changed into a prime (321256213) 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, 125310 + ... + 127847.

It is an arithmetic number, because the mean of its divisors is an integer number (30378960).

Almost surely, 2^321256233 is an apocalyptic number.

It is an amenable number.

321256233 is a deficient number, since it is larger than the sum of its proper divisors (164807127).

321256233 is a wasteful number, since it uses less digits than its factorization.

321256233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253213 (or 253207 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 321256233 is about 17923.6222064626. The cubic root of 321256233 is about 684.8842633952.

It can be divided in two parts, 321256 and 233, that added together give a square (321489 = 567²).

The spelling of 321256233 in words is "three hundred twenty-one million, two hundred fifty-six thousand, two hundred thirty-three".