2172355101 has 48 divisors (see below), whose sum is σ = 3896688640. Its totient is φ = 1138056480.

The previous prime is 2172355079. The next prime is 2172355103. The reversal of 2172355101 is 1015532712.

It is not a de Polignac number, because 2172355101 - 2⁵ = 2172355069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172355103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7836 + ... + 66378.

Almost surely, 2^2172355101 is an apocalyptic number.

2172355101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2172355101 is a deficient number, since it is larger than the sum of its proper divisors (1724333539).

2172355101 is a wasteful number, since it uses less digits than its factorization.

2172355101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58606 (or 58603 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 2172355101 is about 46608.5303458498. The cubic root of 2172355101 is about 1295.1207831968.

Adding to 2172355101 its reverse (1015532712), we get a palindrome (3187887813).

The spelling of 2172355101 in words is "two billion, one hundred seventy-two million, three hundred fifty-five thousand, one hundred one".