2515006421 has 4 divisors (see below), whose sum is σ = 2647375200. Its totient is φ = 2382637644.

The previous prime is 2515006387. The next prime is 2515006433. The reversal of 2515006421 is 1246005152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2515006421 - 2¹⁰ = 2515005397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2515006621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66184361 + ... + 66184398.

It is an arithmetic number, because the mean of its divisors is an integer number (661843800).

Almost surely, 2^2515006421 is an apocalyptic number.

It is an amenable number.

2515006421 is a deficient number, since it is larger than the sum of its proper divisors (132368779).

2515006421 is a wasteful number, since it uses less digits than its factorization.

2515006421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132368778.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2515006421 is about 50149.8396906710. The cubic root of 2515006421 is about 1359.9189724289.

The spelling of 2515006421 in words is "two billion, five hundred fifteen million, six thousand, four hundred twenty-one".