213844077 has 16 divisors (see below), whose sum is σ = 317612160. Its totient is φ = 142200000.

The previous prime is 213844063. The next prime is 213844109. The reversal of 213844077 is 770448312.

It is a happy number.

213844077 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 213844077 - 2⁶ = 213844013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213844177) 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, 952 + ... + 20702.

It is an arithmetic number, because the mean of its divisors is an integer number (19850760).

Almost surely, 2^213844077 is an apocalyptic number.

213844077 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

213844077 is a deficient number, since it is larger than the sum of its proper divisors (103768083).

213844077 is a wasteful number, since it uses less digits than its factorization.

213844077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20161 (or 20155 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 213844077 is about 14623.4085287938. The cubic root of 213844077 is about 597.9970964017.

The spelling of 213844077 in words is "two hundred thirteen million, eight hundred forty-four thousand, seventy-seven".