2142245542 has 4 divisors (see below), whose sum is σ = 3213368316. Its totient is φ = 1071122770.

The previous prime is 2142245537. The next prime is 2142245549. The reversal of 2142245542 is 2455422412.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142245549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535561384 + ... + 535561387.

It is an arithmetic number, because the mean of its divisors is an integer number (803342079).

Almost surely, 2^2142245542 is an apocalyptic number.

2142245542 is a deficient number, since it is larger than the sum of its proper divisors (1071122774).

2142245542 is a wasteful number, since it uses less digits than its factorization.

2142245542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071122773.

The product of its digits is 25600, while the sum is 31.

The square root of 2142245542 is about 46284.3984729196. The cubic root of 2142245542 is about 1289.1093228799.

Adding to 2142245542 its reverse (2455422412), we get a palindrome (4597667954).

The spelling of 2142245542 in words is "two billion, one hundred forty-two million, two hundred forty-five thousand, five hundred forty-two".