25031032531 has 2 divisors, whose sum is σ = 25031032532. Its totient is φ = 25031032530.

The previous prime is 25031032519. The next prime is 25031032547. The reversal of 25031032531 is 13523013052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25031032531 - 2¹³ = 25031024339 is a prime.

It is a super-2 number, since 2×25031032531² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25031032496 and 25031032505.

It is not a weakly prime, because it can be changed into another prime (25031032501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12515516265 + 12515516266.

It is an arithmetic number, because the mean of its divisors is an integer number (12515516266).

Almost surely, 2^25031032531 is an apocalyptic number.

25031032531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25031032531 is an equidigital number, since it uses as much as digits as its factorization.

25031032531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 25031032531 its reverse (13523013052), we get a palindrome (38554045583).

The spelling of 25031032531 in words is "twenty-five billion, thirty-one million, thirty-two thousand, five hundred thirty-one".