123215133 has 16 divisors (see below), whose sum is σ = 183107520. Its totient is φ = 73241856.

The previous prime is 123215129. The next prime is 123215137. The reversal of 123215133 is 331512321.

It is an interprime number because it is at equal distance from previous prime (123215129) and next prime (123215137).

It is not a de Polignac number, because 123215133 - 2² = 123215129 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123215137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62610 + ... + 64547.

It is an arithmetic number, because the mean of its divisors is an integer number (11444220).

Almost surely, 2^123215133 is an apocalyptic number.

It is an amenable number.

123215133 is a deficient number, since it is larger than the sum of its proper divisors (59892387).

123215133 is a wasteful number, since it uses less digits than its factorization.

123215133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127196.

The product of its digits is 540, while the sum is 21.

The square root of 123215133 is about 11100.2312138081. The cubic root of 123215133 is about 497.6087595020.

Adding to 123215133 its reverse (331512321), we get a palindrome (454727454).

The spelling of 123215133 in words is "one hundred twenty-three million, two hundred fifteen thousand, one hundred thirty-three".