213149271 has 4 divisors (see below), whose sum is σ = 284199032. Its totient is φ = 142099512.

The previous prime is 213149263. The next prime is 213149309. The reversal of 213149271 is 172941312.

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

It is not a de Polignac number, because 213149271 - 2³ = 213149263 is a prime.

It is a super-2 number, since 2×213149271² = 90865223455662882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213149231) 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, 35524876 + ... + 35524881.

It is an arithmetic number, because the mean of its divisors is an integer number (71049758).

Almost surely, 2^213149271 is an apocalyptic number.

213149271 is a deficient number, since it is larger than the sum of its proper divisors (71049761).

213149271 is an equidigital number, since it uses as much as digits as its factorization.

213149271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71049760.

The product of its digits is 3024, while the sum is 30.

The square root of 213149271 is about 14599.6325638695. The cubic root of 213149271 is about 597.3487380503.

The spelling of 213149271 in words is "two hundred thirteen million, one hundred forty-nine thousand, two hundred seventy-one".