31212472043 has 8 divisors (see below), whose sum is σ = 31257091248. Its totient is φ = 31167880704.

The previous prime is 31212472019. The next prime is 31212472121. The reversal of 31212472043 is 34027421213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31212472043 - 2¹⁶ = 31212406507 is a prime.

It is a super-2 number, since 2×31212472043² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31212471997 and 31212472015.

It is not an unprimeable number, because it can be changed into a prime (31212472013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3231980 + ... + 3241622.

It is an arithmetic number, because the mean of its divisors is an integer number (3907136406).

Almost surely, 2^31212472043 is an apocalyptic number.

31212472043 is a deficient number, since it is larger than the sum of its proper divisors (44619205).

31212472043 is an equidigital number, since it uses as much as digits as its factorization.

31212472043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13933.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 31212472043 its reverse (34027421213), we get a palindrome (65239893256).

The spelling of 31212472043 in words is "thirty-one billion, two hundred twelve million, four hundred seventy-two thousand, forty-three".