212403202155 has 20 divisors (see below), whose sum is σ = 380752407552. Its totient is φ = 113281707600.

The previous prime is 212403202139. The next prime is 212403202171. The reversal of 212403202155 is 551202304212.

212403202155 is a `hidden beast` number, since 2 + 1 + 2 + 403 + 202 + 1 + 55 = 666.

It is an interprime number because it is at equal distance from previous prime (212403202139) and next prime (212403202171).

It is not a de Polignac number, because 212403202155 - 2⁴ = 212403202139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 262225771 + ... + 262226580.

Almost surely, 2^212403202155 is an apocalyptic number.

212403202155 is a deficient number, since it is larger than the sum of its proper divisors (168349205397).

212403202155 is an equidigital number, since it uses as much as digits as its factorization.

212403202155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524452368 (or 524452359 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 212403202155 its reverse (551202304212), we get a palindrome (763605506367).

The spelling of 212403202155 in words is "two hundred twelve billion, four hundred three million, two hundred two thousand, one hundred fifty-five".