211056613 has 4 divisors (see below), whose sum is σ = 211897728. Its totient is φ = 210215500.

The previous prime is 211056607. The next prime is 211056619. The reversal of 211056613 is 316650112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (211056607) and next prime (211056619).

It is a cyclic number.

It is not a de Polignac number, because 211056613 - 2¹⁷ = 210925541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211056619) 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, 420181 + ... + 420682.

It is an arithmetic number, because the mean of its divisors is an integer number (52974432).

Almost surely, 2^211056613 is an apocalyptic number.

It is an amenable number.

211056613 is a deficient number, since it is larger than the sum of its proper divisors (841115).

211056613 is an equidigital number, since it uses as much as digits as its factorization.

211056613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841114.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 211056613 is about 14527.7876154630. The cubic root of 211056613 is about 595.3874208718.

The spelling of 211056613 in words is "two hundred eleven million, fifty-six thousand, six hundred thirteen".