55431130501 has 2 divisors, whose sum is σ = 55431130502. Its totient is φ = 55431130500.

The previous prime is 55431130493. The next prime is 55431130523. The reversal of 55431130501 is 10503113455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45507982276 + 9923148225 = 213326^2 + 99615^2 .

It is a cyclic number.

It is not a de Polignac number, because 55431130501 - 2³ = 55431130493 is a prime.

It is a super-2 number, since 2×55431130501² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55431130501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55431130541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27715565250 + 27715565251.

It is an arithmetic number, because the mean of its divisors is an integer number (27715565251).

Almost surely, 2^55431130501 is an apocalyptic number.

It is an amenable number.

55431130501 is a deficient number, since it is larger than the sum of its proper divisors (1).

55431130501 is an equidigital number, since it uses as much as digits as its factorization.

55431130501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 55431130501 its reverse (10503113455), we get a palindrome (65934243956).

The spelling of 55431130501 in words is "fifty-five billion, four hundred thirty-one million, one hundred thirty thousand, five hundred one".