25379531 has 2 divisors, whose sum is σ = 25379532. Its totient is φ = 25379530.

The previous prime is 25379489. The next prime is 25379537. The reversal of 25379531 is 13597352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25379531 - 2⁶ = 25379467 is a prime.

It is a super-2 number, since 2×25379531² = 1288241187559922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25379491 and 25379500.

It is not a weakly prime, because it can be changed into another prime (25379537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12689765 + 12689766.

It is an arithmetic number, because the mean of its divisors is an integer number (12689766).

Almost surely, 2^25379531 is an apocalyptic number.

25379531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25379531 is an equidigital number, since it uses as much as digits as its factorization.

25379531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 35.

The square root of 25379531 is about 5037.8101393363. The cubic root of 25379531 is about 293.8740224148.

The spelling of 25379531 in words is "twenty-five million, three hundred seventy-nine thousand, five hundred thirty-one".