2513550021 has 8 divisors (see below), whose sum is σ = 3351745920. Its totient is φ = 1675527072.

The previous prime is 2513550019. The next prime is 2513550073. The reversal of 2513550021 is 1200553152.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2513550021 - 2¹ = 2513550019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2513549973 and 2513550000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2513550421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4320 + ... + 71033.

It is an arithmetic number, because the mean of its divisors is an integer number (418968240).

Almost surely, 2^2513550021 is an apocalyptic number.

It is an amenable number.

2513550021 is a deficient number, since it is larger than the sum of its proper divisors (838195899).

2513550021 is a wasteful number, since it uses less digits than its factorization.

2513550021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86475.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 2513550021 is about 50135.3171028169. The cubic root of 2513550021 is about 1359.6564192989.

The spelling of 2513550021 in words is "two billion, five hundred thirteen million, five hundred fifty thousand, twenty-one".