25135031 has 2 divisors, whose sum is σ = 25135032. Its totient is φ = 25135030.

The previous prime is 25134943. The next prime is 25135037. The reversal of 25135031 is 13053152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25135031 - 2¹⁴ = 25118647 is a prime.

It is a super-2 number, since 2×25135031² = 1263539566741922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25134994 and 25135012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25135037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12567515 + 12567516.

It is an arithmetic number, because the mean of its divisors is an integer number (12567516).

Almost surely, 2^25135031 is an apocalyptic number.

25135031 is a deficient number, since it is larger than the sum of its proper divisors (1).

25135031 is an equidigital number, since it uses as much as digits as its factorization.

25135031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 25135031 is about 5013.4849157048. The cubic root of 25135031 is about 292.9272728906.

Adding to 25135031 its reverse (13053152), we get a palindrome (38188183).

The spelling of 25135031 in words is "twenty-five million, one hundred thirty-five thousand, thirty-one".