2521087918 has 4 divisors (see below), whose sum is σ = 3781631880. Its totient is φ = 1260543958.

The previous prime is 2521087889. The next prime is 2521087949. The reversal of 2521087918 is 8197801252.

It is a happy number.

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

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, 630271978 + ... + 630271981.

It is an arithmetic number, because the mean of its divisors is an integer number (945407970).

Almost surely, 2^2521087918 is an apocalyptic number.

2521087918 is a deficient number, since it is larger than the sum of its proper divisors (1260543962).

2521087918 is a wasteful number, since it uses less digits than its factorization.

2521087918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260543961.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 2521087918 is about 50210.4363454452. The cubic root of 2521087918 is about 1361.0142229081.

The spelling of 2521087918 in words is "two billion, five hundred twenty-one million, eighty-seven thousand, nine hundred eighteen".