212152223523 has 16 divisors (see below), whose sum is σ = 292802293760. Its totient is φ = 136528682976.

The previous prime is 212152223513. The next prime is 212152223533. The reversal of 212152223523 is 325322251212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212152223513) and next prime (212152223533).

It is not a de Polignac number, because 212152223523 - 2¹² = 212152219427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212152223513) 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, 7510633 + ... + 7538826.

It is an arithmetic number, because the mean of its divisors is an integer number (18300143360).

Almost surely, 2^212152223523 is an apocalyptic number.

212152223523 is a deficient number, since it is larger than the sum of its proper divisors (80650070237).

212152223523 is a wasteful number, since it uses less digits than its factorization.

212152223523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15049626.

The product of its digits is 14400, while the sum is 30.

Adding to 212152223523 its reverse (325322251212), we get a palindrome (537474474735).

The spelling of 212152223523 in words is "two hundred twelve billion, one hundred fifty-two million, two hundred twenty-three thousand, five hundred twenty-three".