2542051561 has 16 divisors (see below), whose sum is σ = 2972505600. Its totient is φ = 2128771008.

The previous prime is 2542051543. The next prime is 2542051643. The reversal of 2542051561 is 1651502452.

It is not a de Polignac number, because 2542051561 - 2¹⁷ = 2541920489 is a prime.

It is a super-3 number, since 3×2542051561³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2542051261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74335 + ... + 103003.

It is an arithmetic number, because the mean of its divisors is an integer number (185781600).

Almost surely, 2^2542051561 is an apocalyptic number.

It is an amenable number.

2542051561 is a deficient number, since it is larger than the sum of its proper divisors (430454039).

2542051561 is a wasteful number, since it uses less digits than its factorization.

2542051561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28968.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 2542051561 is about 50418.7619939244. The cubic root of 2542051561 is about 1364.7762358228.

The spelling of 2542051561 in words is "two billion, five hundred forty-two million, fifty-one thousand, five hundred sixty-one".