72221055502351 has 16 divisors (see below), whose sum is σ = 85385090894400. Its totient is φ = 59768735136768.

The previous prime is 72221055502303. The next prime is 72221055502357. The reversal of 72221055502351 is 15320555012227.

It is a happy number.

It is not a de Polignac number, because 72221055502351 - 2²¹ = 72221053405199 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 (72221055502357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30083541 + ... + 32395393.

It is an arithmetic number, because the mean of its divisors is an integer number (5336568180900).

Almost surely, 2^{72221055502351} is an apocalyptic number.

72221055502351 is a deficient number, since it is larger than the sum of its proper divisors (13164035392049).

72221055502351 is a wasteful number, since it uses less digits than its factorization.

72221055502351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465778.

The product of its (nonzero) digits is 210000, while the sum is 40.

The spelling of 72221055502351 in words is "seventy-two trillion, two hundred twenty-one billion, fifty-five million, five hundred two thousand, three hundred fifty-one".