2031401243 has 4 divisors (see below), whose sum is σ = 2031621840. Its totient is φ = 2031180648.

The previous prime is 2031401231. The next prime is 2031401261. The reversal of 2031401243 is 3421041302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2031401243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2031401143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95855 + ... + 115112.

It is an arithmetic number, because the mean of its divisors is an integer number (507905460).

Almost surely, 2^2031401243 is an apocalyptic number.

2031401243 is a deficient number, since it is larger than the sum of its proper divisors (220597).

2031401243 is an equidigital number, since it uses as much as digits as its factorization.

2031401243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220596.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2031401243 is about 45071.0688025035. The cubic root of 2031401243 is about 1266.4806864603.

Adding to 2031401243 its reverse (3421041302), we get a palindrome (5452442545).

The spelling of 2031401243 in words is "two billion, thirty-one million, four hundred one thousand, two hundred forty-three".