731012213 has 4 divisors (see below), whose sum is σ = 769486560. Its totient is φ = 692537868.

The previous prime is 731012179. The next prime is 731012221. The reversal of 731012213 is 312210137.

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 731012213 - 2¹⁰ = 731011189 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 (731012713) 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, 19237145 + ... + 19237182.

It is an arithmetic number, because the mean of its divisors is an integer number (192371640).

Almost surely, 2^731012213 is an apocalyptic number.

It is an amenable number.

731012213 is a deficient number, since it is larger than the sum of its proper divisors (38474347).

731012213 is a wasteful number, since it uses less digits than its factorization.

731012213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38474346.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 731012213 is about 27037.2375253094. The cubic root of 731012213 is about 900.8273104686.

The spelling of 731012213 in words is "seven hundred thirty-one million, twelve thousand, two hundred thirteen".