31210531131434 has 4 divisors (see below), whose sum is σ = 46815796697154. Its totient is φ = 15605265565716.

The previous prime is 31210531131433. The next prime is 31210531131509. The reversal of 31210531131434 is 43413113501213.

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

It can be written as a sum of positive squares in only one way, i.e., 15878192715025 + 15332338416409 = 3984745^2 + 3915653^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31210531131434.

It is not an unprimeable number, because it can be changed into a prime (31210531131433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7802632782857 + ... + 7802632782860.

Almost surely, 2^{31210531131434} is an apocalyptic number.

31210531131434 is a deficient number, since it is larger than the sum of its proper divisors (15605265565720).

31210531131434 is a wasteful number, since it uses less digits than its factorization.

31210531131434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15605265565719.

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 31210531131434 its reverse (43413113501213), we get a palindrome (74623644632647).

The spelling of 31210531131434 in words is "thirty-one trillion, two hundred ten billion, five hundred thirty-one million, one hundred thirty-one thousand, four hundred thirty-four".