215071711061 has 4 divisors (see below), whose sum is σ = 222009508224. Its totient is φ = 208133913900.

The previous prime is 215071711051. The next prime is 215071711069. The reversal of 215071711061 is 160117170512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215071711061 - 2²² = 215067516757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215071711069) 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, 3468898535 + ... + 3468898596.

It is an arithmetic number, because the mean of its divisors is an integer number (55502377056).

Almost surely, 2^215071711061 is an apocalyptic number.

It is an amenable number.

215071711061 is a deficient number, since it is larger than the sum of its proper divisors (6937797163).

215071711061 is an equidigital number, since it uses as much as digits as its factorization.

215071711061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6937797162.

The product of its (nonzero) digits is 2940, while the sum is 32.

Adding to 215071711061 its reverse (160117170512), we get a palindrome (375188881573).

The spelling of 215071711061 in words is "two hundred fifteen billion, seventy-one million, seven hundred eleven thousand, sixty-one".