2131243042 has 4 divisors (see below), whose sum is σ = 3196864566. Its totient is φ = 1065621520.

The previous prime is 2131243021. The next prime is 2131243067. The reversal of 2131243042 is 2403421312.

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

It can be written as a sum of positive squares in only one way, i.e., 2084744281 + 46498761 = 45659^2 + 6819^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532810759 + ... + 532810762.

Almost surely, 2^2131243042 is an apocalyptic number.

2131243042 is a deficient number, since it is larger than the sum of its proper divisors (1065621524).

2131243042 is a wasteful number, since it uses less digits than its factorization.

2131243042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065621523.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2131243042 is about 46165.3879221219. The cubic root of 2131243042 is about 1286.8985933080.

Adding to 2131243042 its reverse (2403421312), we get a palindrome (4534664354).

The spelling of 2131243042 in words is "two billion, one hundred thirty-one million, two hundred forty-three thousand, forty-two".