213115473 has 6 divisors (see below), whose sum is σ = 307833474. Its totient is φ = 142076976.

The previous prime is 213115471. The next prime is 213115481. The reversal of 213115473 is 374511312.

213115473 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 only one way, i.e., 212663889 + 451584 = 14583^2 + 672^2 .

It is not a de Polignac number, because 213115473 - 2¹ = 213115471 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213115471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11839740 + ... + 11839757.

It is an arithmetic number, because the mean of its divisors is an integer number (51305579).

Almost surely, 2^213115473 is an apocalyptic number.

It is an amenable number.

213115473 is a deficient number, since it is larger than the sum of its proper divisors (94718001).

213115473 is a wasteful number, since it uses less digits than its factorization.

213115473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23679503 (or 23679500 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 213115473 is about 14598.4750230974. The cubic root of 213115473 is about 597.3171635271.

Adding to 213115473 its reverse (374511312), we get a palindrome (587626785).

The spelling of 213115473 in words is "two hundred thirteen million, one hundred fifteen thousand, four hundred seventy-three".