7216535081 has 4 divisors (see below), whose sum is σ = 8247468672. Its totient is φ = 6185601492.

The previous prime is 7216535077. The next prime is 7216535101. The reversal of 7216535081 is 1805356127.

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 not a de Polignac number, because 7216535081 - 2² = 7216535077 is a prime.

It is a super-3 number, since 3×7216535081³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7216531081) 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, 515466785 + ... + 515466798.

It is an arithmetic number, because the mean of its divisors is an integer number (2061867168).

Almost surely, 2^7216535081 is an apocalyptic number.

It is an amenable number.

7216535081 is a deficient number, since it is larger than the sum of its proper divisors (1030933591).

7216535081 is a wasteful number, since it uses less digits than its factorization.

7216535081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030933590.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 7216535081 is about 84950.1917655281. The cubic root of 7216535081 is about 1932.4558284480.

The spelling of 7216535081 in words is "seven billion, two hundred sixteen million, five hundred thirty-five thousand, eighty-one".