42573344731 has 4 divisors (see below), whose sum is σ = 43946678464. Its totient is φ = 41200011000.

The previous prime is 42573344729. The next prime is 42573344761. The reversal of 42573344731 is 13744337524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42573344731 - 2¹ = 42573344729 is a prime.

It is a super-2 number, since 2×42573344731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42573344761) 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, 686666820 + ... + 686666881.

It is an arithmetic number, because the mean of its divisors is an integer number (10986669616).

Almost surely, 2^42573344731 is an apocalyptic number.

42573344731 is a deficient number, since it is larger than the sum of its proper divisors (1373333733).

42573344731 is a wasteful number, since it uses less digits than its factorization.

42573344731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373333732.

The product of its digits is 846720, while the sum is 43.

The spelling of 42573344731 in words is "forty-two billion, five hundred seventy-three million, three hundred forty-four thousand, seven hundred thirty-one".