2212211551 has 4 divisors (see below), whose sum is σ = 2413321704. Its totient is φ = 2011101400.

The previous prime is 2212211527. The next prime is 2212211567. The reversal of 2212211551 is 1551122122.

It is a happy number.

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

It is not a de Polignac number, because 2212211551 - 2¹⁹ = 2211687263 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 (2212211951) 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, 100555060 + ... + 100555081.

It is an arithmetic number, because the mean of its divisors is an integer number (603330426).

Almost surely, 2^2212211551 is an apocalyptic number.

2212211551 is a deficient number, since it is larger than the sum of its proper divisors (201110153).

2212211551 is a wasteful number, since it uses less digits than its factorization.

2212211551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201110152.

The product of its digits is 400, while the sum is 22.

The square root of 2212211551 is about 47034.1530273481. The cubic root of 2212211551 is about 1302.9934079413.

Adding to 2212211551 its reverse (1551122122), we get a palindrome (3763333673).

The spelling of 2212211551 in words is "two billion, two hundred twelve million, two hundred eleven thousand, five hundred fifty-one".