215042929 has 4 divisors (see below), whose sum is σ = 217052784. Its totient is φ = 213033076.

The previous prime is 215042899. The next prime is 215042953. The reversal of 215042929 is 929240512.

215042929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215042929 - 2⁵ = 215042897 is a prime.

It is a super-2 number, since 2×215042929² = 92486922625798082, 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 = 215042894 and 215042903.

It is not an unprimeable number, because it can be changed into a prime (215042959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004767 + ... + 1004980.

It is an arithmetic number, because the mean of its divisors is an integer number (54263196).

Almost surely, 2^215042929 is an apocalyptic number.

It is an amenable number.

215042929 is a deficient number, since it is larger than the sum of its proper divisors (2009855).

215042929 is a wasteful number, since it uses less digits than its factorization.

215042929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009854.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 215042929 is about 14664.3420922999. The cubic root of 215042929 is about 599.1125110677.

The spelling of 215042929 in words is "two hundred fifteen million, forty-two thousand, nine hundred twenty-nine".