743231457342021 has 4 divisors (see below), whose sum is σ = 990975276456032. Its totient is φ = 495487638228012.

The previous prime is 743231457342007. The next prime is 743231457342037. The reversal of 743231457342021 is 120243754132347.

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 not a de Polignac number, because 743231457342021 - 2²⁷ = 743231323124293 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 (743231457342091) 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, 123871909557001 + ... + 123871909557006.

It is an arithmetic number, because the mean of its divisors is an integer number (247743819114008).

Almost surely, 2^{743231457342021} is an apocalyptic number.

It is an amenable number.

743231457342021 is a deficient number, since it is larger than the sum of its proper divisors (247743819114011).

743231457342021 is a wasteful number, since it uses less digits than its factorization.

743231457342021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247743819114010.

The product of its (nonzero) digits is 3386880, while the sum is 48.

The spelling of 743231457342021 in words is "seven hundred forty-three trillion, two hundred thirty-one billion, four hundred fifty-seven million, three hundred forty-two thousand, twenty-one".