2516542321 has 8 divisors (see below), whose sum is σ = 2608984224. Its totient is φ = 2425579680.

The previous prime is 2516542313. The next prime is 2516542337. The reversal of 2516542321 is 1232456152.

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

It is not a de Polignac number, because 2516542321 - 2³ = 2516542313 is a prime.

It is a super-3 number, since 3×2516542321³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2516545321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366351 + ... + 373156.

It is an arithmetic number, because the mean of its divisors is an integer number (326123028).

Almost surely, 2^2516542321 is an apocalyptic number.

It is an amenable number.

2516542321 is a deficient number, since it is larger than the sum of its proper divisors (92441903).

2516542321 is an equidigital number, since it uses as much as digits as its factorization.

2516542321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739631.

The product of its digits is 14400, while the sum is 31.

The square root of 2516542321 is about 50165.1504632449. The cubic root of 2516542321 is about 1360.1957476677.

Adding to 2516542321 its reverse (1232456152), we get a palindrome (3748998473).

The spelling of 2516542321 in words is "two billion, five hundred sixteen million, five hundred forty-two thousand, three hundred twenty-one".