213130501 has 2 divisors, whose sum is σ = 213130502. Its totient is φ = 213130500.

The previous prime is 213130499. The next prime is 213130517. The reversal of 213130501 is 105031312.

It is an a-pointer prime, because the next prime (213130517) can be obtained adding 213130501 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112148100 + 100982401 = 10590^2 + 10049^2 .

It is a cyclic number.

It is not a de Polignac number, because 213130501 - 2¹ = 213130499 is a prime.

It is a super-2 number, since 2×213130501² = 90849220913022002, which contains 22 as substring.

Together with 213130499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213130531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565250 + 106565251.

It is an arithmetic number, because the mean of its divisors is an integer number (106565251).

Almost surely, 2^213130501 is an apocalyptic number.

It is an amenable number.

213130501 is a deficient number, since it is larger than the sum of its proper divisors (1).

213130501 is an equidigital number, since it uses as much as digits as its factorization.

213130501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 213130501 is about 14598.9897253200. The cubic root of 213130501 is about 597.3312032887.

Adding to 213130501 its reverse (105031312), we get a palindrome (318161813).

The spelling of 213130501 in words is "two hundred thirteen million, one hundred thirty thousand, five hundred one".