7142207881 has 2 divisors, whose sum is σ = 7142207882. Its totient is φ = 7142207880.

The previous prime is 7142207857. The next prime is 7142207921. The reversal of 7142207881 is 1887022417.

It is an a-pointer prime, because the next prime (7142207921) can be obtained adding 7142207881 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5652633856 + 1489574025 = 75184^2 + 38595^2 .

It is a cyclic number.

It is not a de Polignac number, because 7142207881 - 2²¹ = 7140110729 is a prime.

It is a super-2 number, since 2×7142207881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7142207801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3571103940 + 3571103941.

It is an arithmetic number, because the mean of its divisors is an integer number (3571103941).

Almost surely, 2^7142207881 is an apocalyptic number.

It is an amenable number.

7142207881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7142207881 is an equidigital number, since it uses as much as digits as its factorization.

7142207881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 7142207881 is about 84511.5843006153. The cubic root of 7142207881 is about 1925.7984324696.

The spelling of 7142207881 in words is "seven billion, one hundred forty-two million, two hundred seven thousand, eight hundred eighty-one".