212513081 has 32 divisors (see below), whose sum is σ = 252364800. Its totient is φ = 176904000.

The previous prime is 212513053. The next prime is 212513101. The reversal of 212513081 is 180315212.

It is a happy number.

212513081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212513081 - 2¹⁰ = 212512057 is a prime.

It is a super-2 number, since 2×212513081² = 90323619192225122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212513381) 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, 1007066 + ... + 1007276.

It is an arithmetic number, because the mean of its divisors is an integer number (7886400).

Almost surely, 2^212513081 is an apocalyptic number.

It is an amenable number.

212513081 is a deficient number, since it is larger than the sum of its proper divisors (39851719).

212513081 is a wasteful number, since it uses less digits than its factorization.

212513081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 212513081 is about 14577.8284048071. The cubic root of 212513081 is about 596.7538403819.

Adding to 212513081 its reverse (180315212), we get a palindrome (392828293).

The spelling of 212513081 in words is "two hundred twelve million, five hundred thirteen thousand, eighty-one".