2051309042 has 4 divisors (see below), whose sum is σ = 3076963566. Its totient is φ = 1025654520.

The previous prime is 2051309021. The next prime is 2051309081. The reversal of 2051309042 is 2409031502.

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., 2003547121 + 47761921 = 44761^2 + 6911^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512827259 + ... + 512827262.

Almost surely, 2^2051309042 is an apocalyptic number.

2051309042 is a deficient number, since it is larger than the sum of its proper divisors (1025654524).

2051309042 is a wasteful number, since it uses less digits than its factorization.

2051309042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025654523.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2051309042 is about 45291.3793342618. The cubic root of 2051309042 is about 1270.6044288457.

The spelling of 2051309042 in words is "two billion, fifty-one million, three hundred nine thousand, forty-two".