2131000345 has 4 divisors (see below), whose sum is σ = 2557200420. Its totient is φ = 1704800272.

The previous prime is 2131000331. The next prime is 2131000373. The reversal of 2131000345 is 5430001312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1377003664 + 753996681 = 37108^2 + 27459^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131000345 - 2¹³ = 2130992153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213100030 + ... + 213100039.

It is an arithmetic number, because the mean of its divisors is an integer number (639300105).

Almost surely, 2^2131000345 is an apocalyptic number.

It is an amenable number.

2131000345 is a deficient number, since it is larger than the sum of its proper divisors (426200075).

2131000345 is an equidigital number, since it uses as much as digits as its factorization.

2131000345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426200074.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2131000345 is about 46162.7592871137. The cubic root of 2131000345 is about 1286.8497425860.

Adding to 2131000345 its reverse (5430001312), we get a palindrome (7561001657).

The spelling of 2131000345 in words is "two billion, one hundred thirty-one million, three hundred forty-five", and thus it is an aban number.