25500221134 has 4 divisors (see below), whose sum is σ = 38250331704. Its totient is φ = 12750110566.

The previous prime is 25500221107. The next prime is 25500221183. The reversal of 25500221134 is 43112200552.

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

It is a super-2 number, since 2×25500221134² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25500221099 and 25500221108.

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, 6375055282 + ... + 6375055285.

It is an arithmetic number, because the mean of its divisors is an integer number (9562582926).

Almost surely, 2^25500221134 is an apocalyptic number.

25500221134 is a deficient number, since it is larger than the sum of its proper divisors (12750110570).

25500221134 is a wasteful number, since it uses less digits than its factorization.

25500221134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12750110569.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 25500221134 its reverse (43112200552), we get a palindrome (68612421686).

The spelling of 25500221134 in words is "twenty-five billion, five hundred million, two hundred twenty-one thousand, one hundred thirty-four".