31212430043 has 4 divisors (see below), whose sum is σ = 31214474448. Its totient is φ = 31210385640.

The previous prime is 31212430037. The next prime is 31212430057. The reversal of 31212430043 is 34003421213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34003421213 = 179 ⋅189963247.

It is a cyclic number.

It is not a de Polignac number, because 31212430043 - 2¹⁶ = 31212364507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212430033) 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, 999128 + ... + 1029893.

It is an arithmetic number, because the mean of its divisors is an integer number (7803618612).

Almost surely, 2^31212430043 is an apocalyptic number.

31212430043 is a deficient number, since it is larger than the sum of its proper divisors (2044405).

31212430043 is a wasteful number, since it uses less digits than its factorization.

31212430043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044404.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31212430043 its reverse (34003421213), we get a palindrome (65215851256).

The spelling of 31212430043 in words is "thirty-one billion, two hundred twelve million, four hundred thirty thousand, forty-three".