212513651 has 32 divisors (see below), whose sum is σ = 272655360. Its totient is φ = 161243136.

The previous prime is 212513647. The next prime is 212513657. The reversal of 212513651 is 156315212.

It is a cyclic number.

It is not a de Polignac number, because 212513651 - 2² = 212513647 is a prime.

It is a super-2 number, since 2×212513651² = 90324103722699602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212513651.

It is not an unprimeable number, because it can be changed into a prime (212513657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436130 + ... + 436616.

It is an arithmetic number, because the mean of its divisors is an integer number (8520480).

Almost surely, 2^212513651 is an apocalyptic number.

212513651 is a deficient number, since it is larger than the sum of its proper divisors (60141709).

212513651 is a wasteful number, since it uses less digits than its factorization.

212513651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723.

The product of its digits is 1800, while the sum is 26.

The square root of 212513651 is about 14577.8479550309. The cubic root of 212513651 is about 596.7543739168.

Adding to 212513651 its reverse (156315212), we get a palindrome (368828863).

The spelling of 212513651 in words is "two hundred twelve million, five hundred thirteen thousand, six hundred fifty-one".