25201354531 has 4 divisors (see below), whose sum is σ = 25355964232. Its totient is φ = 25046744832.

The previous prime is 25201354517. The next prime is 25201354571. The reversal of 25201354531 is 13545310252.

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 25201354531 - 2³³ = 16611419939 is a prime.

It is a super-2 number, since 2×25201354531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25201354493 and 25201354502.

It is not an unprimeable number, because it can be changed into a prime (25201354571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77304606 + ... + 77304931.

It is an arithmetic number, because the mean of its divisors is an integer number (6338991058).

Almost surely, 2^25201354531 is an apocalyptic number.

25201354531 is a deficient number, since it is larger than the sum of its proper divisors (154609701).

25201354531 is a wasteful number, since it uses less digits than its factorization.

25201354531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154609700.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 25201354531 its reverse (13545310252), we get a palindrome (38746664783).

The spelling of 25201354531 in words is "twenty-five billion, two hundred one million, three hundred fifty-four thousand, five hundred thirty-one".