213780127 has 4 divisors (see below), whose sum is σ = 233214696. Its totient is φ = 194345560.

The previous prime is 213780097. The next prime is 213780157. The reversal of 213780127 is 721087312.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (213780097) and next prime (213780157).

It is a cyclic number.

It is not a de Polignac number, because 213780127 - 2²³ = 205391519 is a prime.

It is a super-2 number, since 2×213780127² = 91403885400272258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213780157) 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, 9717268 + ... + 9717289.

It is an arithmetic number, because the mean of its divisors is an integer number (58303674).

Almost surely, 2^213780127 is an apocalyptic number.

213780127 is a deficient number, since it is larger than the sum of its proper divisors (19434569).

213780127 is a wasteful number, since it uses less digits than its factorization.

213780127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19434568.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 213780127 is about 14621.2218025718. The cubic root of 213780127 is about 597.9374801810.

The spelling of 213780127 in words is "two hundred thirteen million, seven hundred eighty thousand, one hundred twenty-seven".