55123431001 has 2 divisors, whose sum is σ = 55123431002. Its totient is φ = 55123431000.

The previous prime is 55123430987. The next prime is 55123431031. The reversal of 55123431001 is 10013432155.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45135427401 + 9988003600 = 212451^2 + 99940^2 .

It is a cyclic number.

It is not a de Polignac number, because 55123431001 - 2⁵ = 55123430969 is a prime.

It is not a weakly prime, because it can be changed into another prime (55123431031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27561715500 + 27561715501.

It is an arithmetic number, because the mean of its divisors is an integer number (27561715501).

Almost surely, 2^55123431001 is an apocalyptic number.

It is an amenable number.

55123431001 is a deficient number, since it is larger than the sum of its proper divisors (1).

55123431001 is an equidigital number, since it uses as much as digits as its factorization.

55123431001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 55123431001 its reverse (10013432155), we get a palindrome (65136863156).

The spelling of 55123431001 in words is "fifty-five billion, one hundred twenty-three million, four hundred thirty-one thousand, one".