25005224542 has 4 divisors (see below), whose sum is σ = 37507836816. Its totient is φ = 12502612270.

The previous prime is 25005224527. The next prime is 25005224599. The reversal of 25005224542 is 24542250052.

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

It is a super-2 number, since 2×25005224542² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6251306134 + ... + 6251306137.

It is an arithmetic number, because the mean of its divisors is an integer number (9376959204).

Almost surely, 2^25005224542 is an apocalyptic number.

25005224542 is a deficient number, since it is larger than the sum of its proper divisors (12502612274).

25005224542 is a wasteful number, since it uses less digits than its factorization.

25005224542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12502612273.

The product of its (nonzero) digits is 32000, while the sum is 31.

Adding to 25005224542 its reverse (24542250052), we get a palindrome (49547474594).

The spelling of 25005224542 in words is "twenty-five billion, five million, two hundred twenty-four thousand, five hundred forty-two".