213115333949 has 4 divisors (see below), whose sum is σ = 243560381664. Its totient is φ = 182670286236.

The previous prime is 213115333919. The next prime is 213115333973. The reversal of 213115333949 is 949333511312.

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 213115333949 - 2¹⁶ = 213115268413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213115333919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15222523847 + ... + 15222523860.

It is an arithmetic number, because the mean of its divisors is an integer number (60890095416).

Almost surely, 2^213115333949 is an apocalyptic number.

It is an amenable number.

213115333949 is a deficient number, since it is larger than the sum of its proper divisors (30445047715).

213115333949 is an equidigital number, since it uses as much as digits as its factorization.

213115333949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30445047714.

The product of its digits is 262440, while the sum is 44.

The spelling of 213115333949 in words is "two hundred thirteen billion, one hundred fifteen million, three hundred thirty-three thousand, nine hundred forty-nine".