215130101 has 4 divisors (see below), whose sum is σ = 217260204. Its totient is φ = 213000000.

The previous prime is 215130077. The next prime is 215130119. The reversal of 215130101 is 101031512.

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

It can be written as a sum of positive squares in 2 ways, for example, as 129937201 + 85192900 = 11399^2 + 9230^2 .

It is a cyclic number.

It is not a de Polignac number, because 215130101 - 2⁶ = 215130037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215130151) 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, 1064900 + ... + 1065101.

It is an arithmetic number, because the mean of its divisors is an integer number (54315051).

Almost surely, 2^215130101 is an apocalyptic number.

It is an amenable number.

215130101 is a deficient number, since it is larger than the sum of its proper divisors (2130103).

215130101 is a wasteful number, since it uses less digits than its factorization.

215130101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130102.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 215130101 is about 14667.3140349554. The cubic root of 215130101 is about 599.1934542554.

Adding to 215130101 its reverse (101031512), we get a palindrome (316161613).

The spelling of 215130101 in words is "two hundred fifteen million, one hundred thirty thousand, one hundred one".