803213165261 has 16 divisors (see below), whose sum is σ = 912272840640. Its totient is φ = 701056736640.

The previous prime is 803213165221. The next prime is 803213165281. The reversal of 803213165261 is 162561312308.

It is a happy number.

It is not a de Polignac number, because 803213165261 - 2¹⁴ = 803213148877 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 (803213165221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2992115 + ... + 3249488.

It is an arithmetic number, because the mean of its divisors is an integer number (57017052540).

Almost surely, 2^803213165261 is an apocalyptic number.

It is an amenable number.

803213165261 is a deficient number, since it is larger than the sum of its proper divisors (109059675379).

803213165261 is a wasteful number, since it uses less digits than its factorization.

803213165261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6242156.

The product of its (nonzero) digits is 51840, while the sum is 38.

Adding to 803213165261 its reverse (162561312308), we get a palindrome (965774477569).

The spelling of 803213165261 in words is "eight hundred three billion, two hundred thirteen million, one hundred sixty-five thousand, two hundred sixty-one".