256211445 has 24 divisors (see below), whose sum is σ = 476868384. Its totient is φ = 117124896.

The previous prime is 256211401. The next prime is 256211477. The reversal of 256211445 is 544112652.

It is not a de Polignac number, because 256211445 - 2¹⁴ = 256195061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173559 + ... + 175028.

It is an arithmetic number, because the mean of its divisors is an integer number (19869516).

Almost surely, 2^256211445 is an apocalyptic number.

It is an amenable number.

256211445 is a deficient number, since it is larger than the sum of its proper divisors (220656939).

256211445 is a wasteful number, since it uses less digits than its factorization.

256211445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348609 (or 348602 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 256211445 is about 16006.6062924031. The cubic root of 256211445 is about 635.1351893537.

The spelling of 256211445 in words is "two hundred fifty-six million, two hundred eleven thousand, four hundred forty-five".