31006157543 has 2 divisors, whose sum is σ = 31006157544. Its totient is φ = 31006157542.

The previous prime is 31006157491. The next prime is 31006157617. The reversal of 31006157543 is 34575160013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31006157543 - 2¹⁸ = 31005895399 is a prime.

It is a super-2 number, since 2×31006157543² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31006157243) 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, 15503078771 + 15503078772.

It is an arithmetic number, because the mean of its divisors is an integer number (15503078772).

Almost surely, 2^31006157543 is an apocalyptic number.

31006157543 is a deficient number, since it is larger than the sum of its proper divisors (1).

31006157543 is an equidigital number, since it uses as much as digits as its factorization.

31006157543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 31006157543 in words is "thirty-one billion, six million, one hundred fifty-seven thousand, five hundred forty-three".