172100245511 has 8 divisors (see below), whose sum is σ = 173131948800. Its totient is φ = 171068966752.

The previous prime is 172100245469. The next prime is 172100245523. The reversal of 172100245511 is 115542001271.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172100245511 is a prime.

It is a super-2 number, since 2×172100245511² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172100248511) 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, 726581 + ... + 933873.

It is an arithmetic number, because the mean of its divisors is an integer number (21641493600).

Almost surely, 2^172100245511 is an apocalyptic number.

172100245511 is a deficient number, since it is larger than the sum of its proper divisors (1031703289).

172100245511 is a wasteful number, since it uses less digits than its factorization.

172100245511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212265.

The product of its (nonzero) digits is 2800, while the sum is 29.

Adding to 172100245511 its reverse (115542001271), we get a palindrome (287642246782).

The spelling of 172100245511 in words is "one hundred seventy-two billion, one hundred million, two hundred forty-five thousand, five hundred eleven".