213019749 has 24 divisors (see below), whose sum is σ = 313185600. Its totient is φ = 139499712.

The previous prime is 213019727. The next prime is 213019753. The reversal of 213019749 is 947910312.

213019749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213019749 - 2⁵ = 213019717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213019789) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147937 + ... + 149369.

It is an arithmetic number, because the mean of its divisors is an integer number (13049400).

Almost surely, 2^213019749 is an apocalyptic number.

It is an amenable number.

213019749 is a deficient number, since it is larger than the sum of its proper divisors (100165851).

213019749 is a wasteful number, since it uses less digits than its factorization.

213019749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721 (or 1718 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 213019749 is about 14595.1960932356. The cubic root of 213019749 is about 597.2277188234.

The spelling of 213019749 in words is "two hundred thirteen million, nineteen thousand, seven hundred forty-nine".