102580252781 has 4 divisors (see below), whose sum is σ = 102907985532. Its totient is φ = 102252520032.

The previous prime is 102580252777. The next prime is 102580252799. The reversal of 102580252781 is 187252085201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49546308100 + 53033944681 = 222590^2 + 230291^2 .

It is a cyclic number.

It is not a de Polignac number, because 102580252781 - 2² = 102580252777 is a prime.

It is a super-2 number, since 2×102580252781² (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 (102580252681) 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, 163865906 + ... + 163866531.

It is an arithmetic number, because the mean of its divisors is an integer number (25726996383).

Almost surely, 2^102580252781 is an apocalyptic number.

It is an amenable number.

102580252781 is a deficient number, since it is larger than the sum of its proper divisors (327732751).

102580252781 is an equidigital number, since it uses as much as digits as its factorization.

102580252781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327732750.

The product of its (nonzero) digits is 89600, while the sum is 41.

The spelling of 102580252781 in words is "one hundred two billion, five hundred eighty million, two hundred fifty-two thousand, seven hundred eighty-one".