213861044 has 12 divisors (see below), whose sum is σ = 374854368. Its totient is φ = 106759800.

The previous prime is 213861029. The next prime is 213861047. The reversal of 213861044 is 440168312.

It is a super-2 number, since 2×213861044² = 91473092281539872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213860998 and 213861016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213861047) 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, 39842 + ... + 44889.

It is an arithmetic number, because the mean of its divisors is an integer number (31237864).

Almost surely, 2^213861044 is an apocalyptic number.

It is an amenable number.

213861044 is a deficient number, since it is larger than the sum of its proper divisors (160993324).

213861044 is a wasteful number, since it uses less digits than its factorization.

213861044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85366 (or 85364 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 213861044 is about 14623.9886487921. The cubic root of 213861044 is about 598.0129115828.

The spelling of 213861044 in words is "two hundred thirteen million, eight hundred sixty-one thousand, forty-four".