2051572170 has 64 divisors (see below), whose sum is σ = 5143958784. Its totient is φ = 522677760.

The previous prime is 2051572129. The next prime is 2051572199. The reversal of 2051572170 is 712751502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 951814 + ... + 953966.

It is an arithmetic number, because the mean of its divisors is an integer number (80374356).

Almost surely, 2^2051572170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2051572170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2571979392).

2051572170 is an abundant number, since it is smaller than the sum of its proper divisors (3092386614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2051572170 is a wasteful number, since it uses less digits than its factorization.

2051572170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567.

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 2051572170 is about 45294.2840764704. The cubic root of 2051572170 is about 1270.6587546934.

The spelling of 2051572170 in words is "two billion, fifty-one million, five hundred seventy-two thousand, one hundred seventy".