140024397521 has 2 divisors, whose sum is σ = 140024397522. Its totient is φ = 140024397520.

The previous prime is 140024397517. The next prime is 140024397533. The reversal of 140024397521 is 125793420041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105040810000 + 34983587521 = 324100^2 + 187039^2 .

It is an emirp because it is prime and its reverse (125793420041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140024397521 - 2² = 140024397517 is a prime.

It is a super-2 number, since 2×140024397521² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (140024397571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70012198760 + 70012198761.

It is an arithmetic number, because the mean of its divisors is an integer number (70012198761).

Almost surely, 2^140024397521 is an apocalyptic number.

It is an amenable number.

140024397521 is a deficient number, since it is larger than the sum of its proper divisors (1).

140024397521 is an equidigital number, since it uses as much as digits as its factorization.

140024397521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 140024397521 in words is "one hundred forty billion, twenty-four million, three hundred ninety-seven thousand, five hundred twenty-one".