210172057 has 2 divisors, whose sum is σ = 210172058. Its totient is φ = 210172056.

The previous prime is 210172049. The next prime is 210172063. The reversal of 210172057 is 750271012.

It is a happy number.

210172057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173738761 + 36433296 = 13181^2 + 6036^2 .

It is a cyclic number.

It is not a de Polignac number, because 210172057 - 2³ = 210172049 is a prime.

It is a super-4 number, since 4×210172057⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (210172087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105086028 + 105086029.

It is an arithmetic number, because the mean of its divisors is an integer number (105086029).

Almost surely, 2^210172057 is an apocalyptic number.

It is an amenable number.

210172057 is a deficient number, since it is larger than the sum of its proper divisors (1).

210172057 is an equidigital number, since it uses as much as digits as its factorization.

210172057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 210172057 is about 14497.3120612064. The cubic root of 210172057 is about 594.5544832450.

The spelling of 210172057 in words is "two hundred ten million, one hundred seventy-two thousand, fifty-seven".