2581501116 has 12 divisors (see below), whose sum is σ = 6023502632. Its totient is φ = 860500368.

The previous prime is 2581501103. The next prime is 2581501123. The reversal of 2581501116 is 6111051852.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107562535 + ... + 107562558.

Almost surely, 2^2581501116 is an apocalyptic number.

It is an amenable number.

2581501116 is an abundant number, since it is smaller than the sum of its proper divisors (3442001516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2581501116 is a wasteful number, since it uses less digits than its factorization.

2581501116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215125100 (or 215125098 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 30.

The square root of 2581501116 is about 50808.4748442620. The cubic root of 2581501116 is about 1371.7999174154.

Adding to 2581501116 its reverse (6111051852), we get a palindrome (8692552968).

The spelling of 2581501116 in words is "two billion, five hundred eighty-one million, five hundred one thousand, one hundred sixteen".