2542256381 has 16 divisors (see below), whose sum is σ = 3078710784. Its totient is φ = 2049318144.

The previous prime is 2542256359. The next prime is 2542256389. The reversal of 2542256381 is 1836522452.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2542256381 is a prime.

It is a super-2 number, since 2×2542256381² = 12926135013470434322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542256389) 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, 161831 + ... + 176843.

It is an arithmetic number, because the mean of its divisors is an integer number (192419424).

Almost surely, 2^2542256381 is an apocalyptic number.

It is an amenable number.

2542256381 is a deficient number, since it is larger than the sum of its proper divisors (536454403).

2542256381 is a wasteful number, since it uses less digits than its factorization.

2542256381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16460.

The product of its digits is 115200, while the sum is 38.

The square root of 2542256381 is about 50420.7931413222. The cubic root of 2542256381 is about 1364.8128894147.

The spelling of 2542256381 in words is "two billion, five hundred forty-two million, two hundred fifty-six thousand, three hundred eighty-one".