172220550051 has 12 divisors (see below), whose sum is σ = 252400365896. Its totient is φ = 104376090720.

The previous prime is 172220550049. The next prime is 172220550067. The reversal of 172220550051 is 150055022271.

It is not a de Polignac number, because 172220550051 - 2¹ = 172220550049 is a prime.

It is a super-2 number, since 2×172220550051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172220550031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237218026 + ... + 237218751.

Almost surely, 2^172220550051 is an apocalyptic number.

172220550051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172220550051 is a deficient number, since it is larger than the sum of its proper divisors (80179815845).

172220550051 is a wasteful number, since it uses less digits than its factorization.

172220550051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474436802 (or 474436791 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 30.

The spelling of 172220550051 in words is "one hundred seventy-two billion, two hundred twenty million, five hundred fifty thousand, fifty-one".