212520115 has 16 divisors (see below), whose sum is σ = 267337728. Its totient is φ = 161875296.

The previous prime is 212520109. The next prime is 212520127. The reversal of 212520115 is 511025212.

It is a cyclic number.

It is not a de Polignac number, because 212520115 - 2⁷ = 212519987 is a prime.

It is a super-2 number, since 2×212520115² = 90329598559226450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212520092 and 212520101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21502 + ... + 29788.

It is an arithmetic number, because the mean of its divisors is an integer number (16708608).

Almost surely, 2^212520115 is an apocalyptic number.

212520115 is a deficient number, since it is larger than the sum of its proper divisors (54817613).

212520115 is a wasteful number, since it uses less digits than its factorization.

212520115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8538.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 212520115 is about 14578.0696595949. The cubic root of 212520115 is about 596.7604243221.

Adding to 212520115 its reverse (511025212), we get a palindrome (723545327).

The spelling of 212520115 in words is "two hundred twelve million, five hundred twenty thousand, one hundred fifteen".