215107423 has 4 divisors (see below), whose sum is σ = 215539000. Its totient is φ = 214675848.

The previous prime is 215107327. The next prime is 215107429. The reversal of 215107423 is 324701512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 215107423 - 2²⁵ = 181552991 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 (215107429) 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, 215040 + ... + 216037.

It is an arithmetic number, because the mean of its divisors is an integer number (53884750).

Almost surely, 2^215107423 is an apocalyptic number.

215107423 is a deficient number, since it is larger than the sum of its proper divisors (431577).

215107423 is an equidigital number, since it uses as much as digits as its factorization.

215107423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431576.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 215107423 is about 14666.5409350671. The cubic root of 215107423 is about 599.1723988001.

Adding to 215107423 its reverse (324701512), we get a palindrome (539808935).

The spelling of 215107423 in words is "two hundred fifteen million, one hundred seven thousand, four hundred twenty-three".