2131020442 has 4 divisors (see below), whose sum is σ = 3196530666. Its totient is φ = 1065510220.

The previous prime is 2131020433. The next prime is 2131020481. The reversal of 2131020442 is 2440201312.

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., 2115172081 + 15848361 = 45991^2 + 3981^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532755109 + ... + 532755112.

Almost surely, 2^2131020442 is an apocalyptic number.

2131020442 is a deficient number, since it is larger than the sum of its proper divisors (1065510224).

2131020442 is a wasteful number, since it uses less digits than its factorization.

2131020442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065510223.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2131020442 is about 46162.9769620634. The cubic root of 2131020442 is about 1286.8537879065.

Adding to 2131020442 its reverse (2440201312), we get a palindrome (4571221754).

The spelling of 2131020442 in words is "two billion, one hundred thirty-one million, twenty thousand, four hundred forty-two".