212340155 has 8 divisors (see below), whose sum is σ = 254971392. Its totient is φ = 169763328.

The previous prime is 212340119. The next prime is 212340157. The reversal of 212340155 is 551043212.

212340155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212340155 - 2⁶ = 212340091 is a prime.

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 212340155.

It is not an unprimeable number, because it can be changed into a prime (212340157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4454 + ... + 21083.

It is an arithmetic number, because the mean of its divisors is an integer number (31871424).

Almost surely, 2^212340155 is an apocalyptic number.

212340155 is a deficient number, since it is larger than the sum of its proper divisors (42631237).

212340155 is a wasteful number, since it uses less digits than its factorization.

212340155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27205.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 212340155 is about 14571.8960674306. The cubic root of 212340155 is about 596.5919330817.

Adding to 212340155 its reverse (551043212), we get a palindrome (763383367).

The spelling of 212340155 in words is "two hundred twelve million, three hundred forty thousand, one hundred fifty-five".