31255563429479 has 2 divisors, whose sum is σ = 31255563429480. Its totient is φ = 31255563429478.

The previous prime is 31255563429449. The next prime is 31255563429491. The reversal of 31255563429479 is 97492436555213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31255563429479 - 2¹⁶ = 31255563363943 is a prime.

It is a super-2 number, since 2×31255563429479² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31255563429449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15627781714739 + 15627781714740.

It is an arithmetic number, because the mean of its divisors is an integer number (15627781714740).

Almost surely, 2^{31255563429479} is an apocalyptic number.

31255563429479 is a deficient number, since it is larger than the sum of its proper divisors (1).

31255563429479 is an equidigital number, since it uses as much as digits as its factorization.

31255563429479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944000, while the sum is 65.

The spelling of 31255563429479 in words is "thirty-one trillion, two hundred fifty-five billion, five hundred sixty-three million, four hundred twenty-nine thousand, four hundred seventy-nine".