5515216251 has 8 divisors (see below), whose sum is σ = 7356909120. Its totient is φ = 3675167112.

The previous prime is 5515216247. The next prime is 5515216283. The reversal of 5515216251 is 1526125155.

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

It is not a de Polignac number, because 5515216251 - 2² = 5515216247 is a prime.

It is a super-2 number, since 2×5515216251² = 60835220590588990002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5515216151) 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, 403081 + ... + 416538.

It is an arithmetic number, because the mean of its divisors is an integer number (919613640).

Almost surely, 2^5515216251 is an apocalyptic number.

5515216251 is a deficient number, since it is larger than the sum of its proper divisors (1841692869).

5515216251 is a wasteful number, since it uses less digits than its factorization.

5515216251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821865.

The product of its digits is 15000, while the sum is 33.

The square root of 5515216251 is about 74264.5019575302. The cubic root of 5515216251 is about 1766.8005071538.

The spelling of 5515216251 in words is "five billion, five hundred fifteen million, two hundred sixteen thousand, two hundred fifty-one".