213746971 has 4 divisors (see below), whose sum is σ = 213839272. Its totient is φ = 213654672.

The previous prime is 213746963. The next prime is 213746987. The reversal of 213746971 is 179647312.

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

It is a cyclic number.

It is not a de Polignac number, because 213746971 - 2³ = 213746963 is a prime.

It is a super-2 number, since 2×213746971² = 91375535223349682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213756971) 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, 42585 + ... + 47338.

It is an arithmetic number, because the mean of its divisors is an integer number (53459818).

Almost surely, 2^213746971 is an apocalyptic number.

213746971 is a deficient number, since it is larger than the sum of its proper divisors (92301).

213746971 is an equidigital number, since it uses as much as digits as its factorization.

213746971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92300.

The product of its digits is 63504, while the sum is 40.

The square root of 213746971 is about 14620.0879272322. The cubic root of 213746971 is about 597.9065664250.

The spelling of 213746971 in words is "two hundred thirteen million, seven hundred forty-six thousand, nine hundred seventy-one".