2172057406 has 4 divisors (see below), whose sum is σ = 3258086112. Its totient is φ = 1086028702.

The previous prime is 2172057401. The next prime is 2172057413. The reversal of 2172057406 is 6047502712.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172057401) 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 as a sum of consecutive naturals, namely, 543014350 + ... + 543014353.

It is an arithmetic number, because the mean of its divisors is an integer number (814521528).

Almost surely, 2^2172057406 is an apocalyptic number.

2172057406 is a deficient number, since it is larger than the sum of its proper divisors (1086028706).

2172057406 is a wasteful number, since it uses less digits than its factorization.

2172057406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086028705.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 2172057406 is about 46605.3366686692. The cubic root of 2172057406 is about 1295.0616202796.

The spelling of 2172057406 in words is "two billion, one hundred seventy-two million, fifty-seven thousand, four hundred six".