212513225 has 6 divisors (see below), whose sum is σ = 263516430. Its totient is φ = 170010560.

The previous prime is 212513219. The next prime is 212513269. The reversal of 212513225 is 522315212.

212513225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 59644729 + 152868496 = 7723^2 + 12364^2 .

It is not a de Polignac number, because 212513225 - 2⁸ = 212512969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212513225.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4250240 + ... + 4250289.

It is an arithmetic number, because the mean of its divisors is an integer number (43919405).

Almost surely, 2^212513225 is an apocalyptic number.

212513225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212513225 is a deficient number, since it is larger than the sum of its proper divisors (51003205).

212513225 is an equidigital number, since it uses as much as digits as its factorization.

212513225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500539 (or 8500534 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 212513225 is about 14577.8333438135. The cubic root of 212513225 is about 596.7539751698.

Adding to 212513225 its reverse (522315212), we get a palindrome (734828437).

It can be divided in two parts, 21 and 2513225, that multiplied together give a palindrome (52777725).

The spelling of 212513225 in words is "two hundred twelve million, five hundred thirteen thousand, two hundred twenty-five".