102055540440431 has 4 divisors (see below), whose sum is σ = 102177179941200. Its totient is φ = 101933900939664.

The previous prime is 102055540440331. The next prime is 102055540440443. The reversal of 102055540440431 is 134044045550201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102055540440431 is a prime.

It is a super-2 number, since 2×102055540440431² (a number of 29 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 (102055540440131) 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, 60819749126 + ... + 60819750803.

It is an arithmetic number, because the mean of its divisors is an integer number (25544294985300).

Almost surely, 2^{102055540440431} is an apocalyptic number.

102055540440431 is a deficient number, since it is larger than the sum of its proper divisors (121639500769).

102055540440431 is an equidigital number, since it uses as much as digits as its factorization.

102055540440431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121639500768.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 102055540440431 its reverse (134044045550201), we get a palindrome (236099585990632).

The spelling of 102055540440431 in words is "one hundred two trillion, fifty-five billion, five hundred forty million, four hundred forty thousand, four hundred thirty-one".