213031653 has 4 divisors (see below), whose sum is σ = 284042208. Its totient is φ = 142021100.

The previous prime is 213031633. The next prime is 213031661. The reversal of 213031653 is 356130312.

It is a happy number.

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 213031653 - 2⁸ = 213031397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213031603) 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, 35505273 + ... + 35505278.

It is an arithmetic number, because the mean of its divisors is an integer number (71010552).

Almost surely, 2^213031653 is an apocalyptic number.

It is an amenable number.

213031653 is a deficient number, since it is larger than the sum of its proper divisors (71010555).

213031653 is an equidigital number, since it uses as much as digits as its factorization.

213031653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71010554.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 213031653 is about 14595.6038929535. The cubic root of 213031653 is about 597.2388434043.

Adding to 213031653 its reverse (356130312), we get a palindrome (569161965).

The spelling of 213031653 in words is "two hundred thirteen million, thirty-one thousand, six hundred fifty-three".