215052101 has 4 divisors (see below), whose sum is σ = 234602304. Its totient is φ = 195501900.

The previous prime is 215052083. The next prime is 215052107. The reversal of 215052101 is 101250512.

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 not a de Polignac number, because 215052101 - 2¹⁸ = 214789957 is a prime.

It is a super-2 number, since 2×215052101² = 92494812289028402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215052101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215052107) 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, 9775085 + ... + 9775106.

It is an arithmetic number, because the mean of its divisors is an integer number (58650576).

Almost surely, 2^215052101 is an apocalyptic number.

It is an amenable number.

215052101 is a deficient number, since it is larger than the sum of its proper divisors (19550203).

215052101 is a wasteful number, since it uses less digits than its factorization.

215052101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19550202.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 215052101 is about 14664.6548203495. The cubic root of 215052101 is about 599.1210287187.

The spelling of 215052101 in words is "two hundred fifteen million, fifty-two thousand, one hundred one".