25531085001 has 16 divisors (see below), whose sum is σ = 34139880000. Its totient is φ = 16971569088.

The previous prime is 25531084987. The next prime is 25531085039. The reversal of 25531085001 is 10058013552.

It is not a de Polignac number, because 25531085001 - 2³⁰ = 24457343177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25531085001.

It is not an unprimeable number, because it can be changed into a prime (25531085051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1832875 + ... + 1846751.

It is an arithmetic number, because the mean of its divisors is an integer number (2133742500).

Almost surely, 2^25531085001 is an apocalyptic number.

It is an amenable number.

25531085001 is a deficient number, since it is larger than the sum of its proper divisors (8608794999).

25531085001 is a wasteful number, since it uses less digits than its factorization.

25531085001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15608.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 25531085001 its reverse (10058013552), we get a palindrome (35589098553).

The spelling of 25531085001 in words is "twenty-five billion, five hundred thirty-one million, eighty-five thousand, one".