7140249981 has 32 divisors (see below), whose sum is σ = 10687824000. Its totient is φ = 4711029120.

The previous prime is 7140249979. The next prime is 7140250001. The reversal of 7140249981 is 1899420417.

It is a happy number.

7140249981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7140249981 - 2¹ = 7140249979 is a prime.

It is a super-2 number, since 2×7140249981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7140249911) 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 in 31 ways as a sum of consecutive naturals, for example, 1288186 + ... + 1293716.

It is an arithmetic number, because the mean of its divisors is an integer number (333994500).

Almost surely, 2^7140249981 is an apocalyptic number.

It is an amenable number.

7140249981 is a deficient number, since it is larger than the sum of its proper divisors (3547574019).

7140249981 is a wasteful number, since it uses less digits than its factorization.

7140249981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6026 (or 6020 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 7140249981 is about 84499.9998875740. Note that the first 3 decimals coincide. The cubic root of 7140249981 is about 1925.6224427568.

The spelling of 7140249981 in words is "seven billion, one hundred forty million, two hundred forty-nine thousand, nine hundred eighty-one".