212161015 has 8 divisors (see below), whose sum is σ = 277738128. Its totient is φ = 154298880.

The previous prime is 212161009. The next prime is 212161051. The reversal of 212161015 is 510161212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212161015 - 2⁷ = 212160887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212160983 and 212161001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1928682 + ... + 1928791.

It is an arithmetic number, because the mean of its divisors is an integer number (34717266).

Almost surely, 2^212161015 is an apocalyptic number.

212161015 is a deficient number, since it is larger than the sum of its proper divisors (65577113).

212161015 is a wasteful number, since it uses less digits than its factorization.

212161015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857489.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 212161015 is about 14565.7480068824. The cubic root of 212161015 is about 596.4241150078.

It can be divided in two parts, 2121 and 61015, that added together give a palindrome (63136).

The spelling of 212161015 in words is "two hundred twelve million, one hundred sixty-one thousand, fifteen".