31125343547 has 2 divisors, whose sum is σ = 31125343548. Its totient is φ = 31125343546.

The previous prime is 31125343541. The next prime is 31125343597. The reversal of 31125343547 is 74534352113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31125343547 - 2²² = 31121149243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31125343547.

It is not a weakly prime, because it can be changed into another prime (31125343541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562671773 + 15562671774.

It is an arithmetic number, because the mean of its divisors is an integer number (15562671774).

Almost surely, 2^31125343547 is an apocalyptic number.

31125343547 is a deficient number, since it is larger than the sum of its proper divisors (1).

31125343547 is an equidigital number, since it uses as much as digits as its factorization.

31125343547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 38.

The spelling of 31125343547 in words is "thirty-one billion, one hundred twenty-five million, three hundred forty-three thousand, five hundred forty-seven".