7140512381 has 2 divisors, whose sum is σ = 7140512382. Its totient is φ = 7140512380.

The previous prime is 7140512369. The next prime is 7140512411. The reversal of 7140512381 is 1832150417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7135180900 + 5331481 = 84470^2 + 2309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7140512381 is a prime.

It is a super-2 number, since 2×7140512381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7140512581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3570256190 + 3570256191.

It is an arithmetic number, because the mean of its divisors is an integer number (3570256191).

Almost surely, 2^7140512381 is an apocalyptic number.

It is an amenable number.

7140512381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7140512381 is an equidigital number, since it uses as much as digits as its factorization.

7140512381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 7140512381 is about 84501.5525360333. The cubic root of 7140512381 is about 1925.6460309664.

Adding to 7140512381 its reverse (1832150417), we get a palindrome (8972662798).

The spelling of 7140512381 in words is "seven billion, one hundred forty million, five hundred twelve thousand, three hundred eighty-one".