103523291981 has 8 divisors (see below), whose sum is σ = 109705087800. Its totient is φ = 97515631360.

The previous prime is 103523291969. The next prime is 103523291999. The reversal of 103523291981 is 189192325301.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4049285956 + 99474006025 = 63634^2 + 315395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 103523291981 - 2⁶ = 103523291917 is a prime.

It is a super-2 number, since 2×103523291981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103523291581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43532576 + ... + 43534953.

It is an arithmetic number, because the mean of its divisors is an integer number (13713135975).

Almost surely, 2^103523291981 is an apocalyptic number.

It is an amenable number.

103523291981 is a deficient number, since it is larger than the sum of its proper divisors (6181795819).

103523291981 is an equidigital number, since it uses as much as digits as its factorization.

103523291981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87067599.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 103523291981 in words is "one hundred three billion, five hundred twenty-three million, two hundred ninety-one thousand, nine hundred eighty-one".