210051345 has 32 divisors (see below), whose sum is σ = 393034752. Its totient is φ = 93788352.

The previous prime is 210051343. The next prime is 210051377. The reversal of 210051345 is 543150012.

It is not a de Polignac number, because 210051345 - 2¹ = 210051343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (210051343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18747 + ... + 27776.

It is an arithmetic number, because the mean of its divisors is an integer number (12282336).

Almost surely, 2^210051345 is an apocalyptic number.

It is an amenable number.

210051345 is a deficient number, since it is larger than the sum of its proper divisors (182983407).

210051345 is a wasteful number, since it uses less digits than its factorization.

210051345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46581.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 210051345 is about 14493.1482087226. The cubic root of 210051345 is about 594.4406342927.

The spelling of 210051345 in words is "two hundred ten million, fifty-one thousand, three hundred forty-five".