25431011 has 4 divisors (see below), whose sum is σ = 25668792. Its totient is φ = 25193232.

The previous prime is 25431001. The next prime is 25431013. The reversal of 25431011 is 11013452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25431011 - 2²² = 21236707 is a prime.

It is a super-3 number, since 3×25431011³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25431013) 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 in 3 ways as a sum of consecutive naturals, for example, 118730 + ... + 118943.

It is an arithmetic number, because the mean of its divisors is an integer number (6417198).

Almost surely, 2^25431011 is an apocalyptic number.

25431011 is a deficient number, since it is larger than the sum of its proper divisors (237781).

25431011 is a wasteful number, since it uses less digits than its factorization.

25431011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237780.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 25431011 is about 5042.9169138506. The cubic root of 25431011 is about 294.0725868561.

Adding to 25431011 its reverse (11013452), we get a palindrome (36444463).

The spelling of 25431011 in words is "twenty-five million, four hundred thirty-one thousand, eleven".