215113255101 has 6 divisors (see below), whose sum is σ = 310719146270. Its totient is φ = 143408836728.

The previous prime is 215113255099. The next prime is 215113255121. The reversal of 215113255101 is 101552311512.

It is a happy number.

215113255101 is a `hidden beast` number, since 2 + 15 + 1 + 132 + 5 + 510 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 166055435001 + 49057820100 = 407499^2 + 221490^2 .

It is not a de Polignac number, because 215113255101 - 2¹ = 215113255099 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 (215113255121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11950736386 + ... + 11950736403.

Almost surely, 2^215113255101 is an apocalyptic number.

It is an amenable number.

215113255101 is a deficient number, since it is larger than the sum of its proper divisors (95605891169).

215113255101 is a wasteful number, since it uses less digits than its factorization.

215113255101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23901472795 (or 23901472792 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

Adding to 215113255101 its reverse (101552311512), we get a palindrome (316665566613).

The spelling of 215113255101 in words is "two hundred fifteen billion, one hundred thirteen million, two hundred fifty-five thousand, one hundred one".