2123235570 has 128 divisors (see below), whose sum is σ = 5812715520. Its totient is φ = 493194240.

The previous prime is 2123235487. The next prime is 2123235571. The reversal of 2123235570 is 755323212.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (2123235571) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 360711 + ... + 366549.

It is an arithmetic number, because the mean of its divisors is an integer number (45411840).

Almost surely, 2^2123235570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2123235570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2906357760).

2123235570 is an abundant number, since it is smaller than the sum of its proper divisors (3689479950).

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

2123235570 is a wasteful number, since it uses less digits than its factorization.

2123235570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5920.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 2123235570 is about 46078.5803817783. The cubic root of 2123235570 is about 1285.2848657107.

Adding to 2123235570 its reverse (755323212), we get a palindrome (2878558782).

The spelling of 2123235570 in words is "two billion, one hundred twenty-three million, two hundred thirty-five thousand, five hundred seventy".