212172320274 has 64 divisors (see below), whose sum is σ = 465726723840. Its totient is φ = 64140339200.

The previous prime is 212172320203. The next prime is 212172320287. The reversal of 212172320274 is 472023271212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1416574 + ... + 1559174.

It is an arithmetic number, because the mean of its divisors is an integer number (7276980060).

Almost surely, 2^212172320274 is an apocalyptic number.

212172320274 is an abundant number, since it is smaller than the sum of its proper divisors (253554403566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212172320274 is a wasteful number, since it uses less digits than its factorization.

212172320274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143155.

The product of its (nonzero) digits is 18816, while the sum is 33.

Adding to 212172320274 its reverse (472023271212), we get a palindrome (684195591486).

The spelling of 212172320274 in words is "two hundred twelve billion, one hundred seventy-two million, three hundred twenty thousand, two hundred seventy-four".