25145531 has 8 divisors (see below), whose sum is σ = 26518800. Its totient is φ = 23777280.

The previous prime is 25145501. The next prime is 25145539. The reversal of 25145531 is 13554152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25145531 - 2⁶ = 25145467 is a prime.

It is a super-2 number, since 2×25145531² = 1264595458543922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25145531.

It is not an unprimeable number, because it can be changed into a prime (25145539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13751 + ... + 15471.

It is an arithmetic number, because the mean of its divisors is an integer number (3314850).

Almost surely, 2^25145531 is an apocalyptic number.

25145531 is a deficient number, since it is larger than the sum of its proper divisors (1373269).

25145531 is a wasteful number, since it uses less digits than its factorization.

25145531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509.

The product of its digits is 3000, while the sum is 26.

The square root of 25145531 is about 5014.5319821495. The cubic root of 25145531 is about 292.9680567163.

Adding to 25145531 its reverse (13554152), we get a palindrome (38699683).

The spelling of 25145531 in words is "twenty-five million, one hundred forty-five thousand, five hundred thirty-one".