102000140581 has 4 divisors (see below), whose sum is σ = 102990433312. Its totient is φ = 101009847852.

The previous prime is 102000140563. The next prime is 102000140591. The reversal of 102000140581 is 185041000201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102000140581 - 2⁵ = 102000140549 is a prime.

It is a super-2 number, since 2×102000140581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102000140521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495146211 + ... + 495146416.

It is an arithmetic number, because the mean of its divisors is an integer number (25747608328).

Almost surely, 2^102000140581 is an apocalyptic number.

It is an amenable number.

102000140581 is a deficient number, since it is larger than the sum of its proper divisors (990292731).

102000140581 is an equidigital number, since it uses as much as digits as its factorization.

102000140581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990292730.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 102000140581 its reverse (185041000201), we get a palindrome (287041140782).

The spelling of 102000140581 in words is "one hundred two billion, one hundred forty thousand, five hundred eighty-one".