25531011 has 64 divisors (see below), whose sum is σ = 44236800. Its totient is φ = 14407200.

The previous prime is 25530997. The next prime is 25531013. The reversal of 25531011 is 11013552.

It is not a de Polignac number, because 25531011 - 2¹⁴ = 25514627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25531013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 432700 + ... + 432758.

It is an arithmetic number, because the mean of its divisors is an integer number (691200).

Almost surely, 2^25531011 is an apocalyptic number.

25531011 is a deficient number, since it is larger than the sum of its proper divisors (18705789).

25531011 is a wasteful number, since it uses less digits than its factorization.

25531011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 25531011 is about 5052.8220827573. The cubic root of 25531011 is about 294.4575341622.

Adding to 25531011 its reverse (11013552), we get a palindrome (36544563).

The spelling of 25531011 in words is "twenty-five million, five hundred thirty-one thousand, eleven".