212525747 has 4 divisors (see below), whose sum is σ = 242886576. Its totient is φ = 182164920.

The previous prime is 212525713. The next prime is 212525749. The reversal of 212525747 is 747525212.

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

It is not a de Polignac number, because 212525747 - 2¹⁶ = 212460211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212525749) 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, 15180404 + ... + 15180417.

It is an arithmetic number, because the mean of its divisors is an integer number (60721644).

Almost surely, 2^212525747 is an apocalyptic number.

212525747 is a deficient number, since it is larger than the sum of its proper divisors (30360829).

212525747 is an equidigital number, since it uses as much as digits as its factorization.

212525747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30360828.

The product of its digits is 39200, while the sum is 35.

The square root of 212525747 is about 14578.2628251791. The cubic root of 212525747 is about 596.7656958623.

It can be divided in two parts, 2125 and 25747, that added together give a palindrome (27872).

The spelling of 212525747 in words is "two hundred twelve million, five hundred twenty-five thousand, seven hundred forty-seven".