31480529 has 2 divisors, whose sum is σ = 31480530. Its totient is φ = 31480528.

The previous prime is 31480507. The next prime is 31480621. The reversal of 31480529 is 92508413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25230529 + 6250000 = 5023^2 + 2500^2 .

It is an emirp because it is prime and its reverse (92508413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31480529 - 2¹² = 31476433 is a prime.

It is a super-2 number, since 2×31480529² = 1982047412239682, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31480495 and 31480504.

It is not a weakly prime, because it can be changed into another prime (31480129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15740264 + 15740265.

It is an arithmetic number, because the mean of its divisors is an integer number (15740265).

Almost surely, 2^31480529 is an apocalyptic number.

It is an amenable number.

31480529 is a deficient number, since it is larger than the sum of its proper divisors (1).

31480529 is an equidigital number, since it uses as much as digits as its factorization.

31480529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 31480529 is about 5610.7511974779. The cubic root of 31480529 is about 315.7528945988.

The spelling of 31480529 in words is "thirty-one million, four hundred eighty thousand, five hundred twenty-nine".