2131570 has 32 divisors (see below), whose sum is σ = 4508928. Its totient is φ = 710208.

The previous prime is 2131567. The next prime is 2131573. The reversal of 2131570 is 751312.

It is an interprime number because it is at equal distance from previous prime (2131567) and next prime (2131573).

It is not an unprimeable number, because it can be changed into a prime (2131573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2179 + ... + 3001.

It is an arithmetic number, because the mean of its divisors is an integer number (140904).

2^2131570 is an apocalyptic number.

2131570 is an abundant number, since it is smaller than the sum of its proper divisors (2377358).

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

2131570 is a wasteful number, since it uses less digits than its factorization.

2131570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 2131570 is about 1459.9897259912. The cubic root of 2131570 is about 128.6964398454.

Adding to 2131570 its reverse (751312), we get a palindrome (2882882).

It can be divided in two parts, 2131 and 570, that added together give a triangular number (2701 = T₇₃).

The spelling of 2131570 in words is "two million, one hundred thirty-one thousand, five hundred seventy".