212415551401 has 4 divisors (see below), whose sum is σ = 212431902804. Its totient is φ = 212399200000.

The previous prime is 212415551363. The next prime is 212415551417. The reversal of 212415551401 is 104155514212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27580905625 + 184834645776 = 166075^2 + 429924^2 .

It is a cyclic number.

It is not a de Polignac number, because 212415551401 - 2²⁵ = 212381996969 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212415551441) 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, 8156200 + ... + 8182201.

It is an arithmetic number, because the mean of its divisors is an integer number (53107975701).

Almost surely, 2^212415551401 is an apocalyptic number.

It is an amenable number.

212415551401 is a deficient number, since it is larger than the sum of its proper divisors (16351403).

212415551401 is a wasteful number, since it uses less digits than its factorization.

212415551401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16351402.

The product of its (nonzero) digits is 8000, while the sum is 31.

The spelling of 212415551401 in words is "two hundred twelve billion, four hundred fifteen million, five hundred fifty-one thousand, four hundred one".