7015138281 has 24 divisors (see below), whose sum is σ = 10738249704. Its totient is φ = 4397875200.

The previous prime is 7015138279. The next prime is 7015138297. The reversal of 7015138281 is 1828315107.

It can be written as a sum of positive squares in 4 ways, for example, as 112021056 + 6903117225 = 10584^2 + 83085^2 .

It is not a de Polignac number, because 7015138281 - 2¹ = 7015138279 is a prime.

It is a super-2 number, since 2×7015138281² = 98424330203103269922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7015138231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164665 + ... + 202841.

It is an arithmetic number, because the mean of its divisors is an integer number (447427071).

Almost surely, 2^7015138281 is an apocalyptic number.

It is an amenable number.

7015138281 is a deficient number, since it is larger than the sum of its proper divisors (3723111423).

7015138281 is a wasteful number, since it uses less digits than its factorization.

7015138281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39401 (or 39398 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 7015138281 is about 83756.4223268879. The cubic root of 7015138281 is about 1914.3091656058.

The spelling of 7015138281 in words is "seven billion, fifteen million, one hundred thirty-eight thousand, two hundred eighty-one".