213502071 has 16 divisors (see below), whose sum is σ = 288264960. Its totient is φ = 140548800.

The previous prime is 213502063. The next prime is 213502103. The reversal of 213502071 is 170205312.

It is not a de Polignac number, because 213502071 - 2³ = 213502063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213502001) 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, 79771 + ... + 82403.

It is an arithmetic number, because the mean of its divisors is an integer number (18016560).

Almost surely, 2^213502071 is an apocalyptic number.

213502071 is a deficient number, since it is larger than the sum of its proper divisors (74762889).

213502071 is a wasteful number, since it uses less digits than its factorization.

213502071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2966.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 213502071 is about 14611.7100641917. The cubic root of 213502071 is about 597.6781292282.

Adding to 213502071 its reverse (170205312), we get a palindrome (383707383).

The spelling of 213502071 in words is "two hundred thirteen million, five hundred two thousand, seventy-one".