55403120501 has 2 divisors, whose sum is σ = 55403120502. Its totient is φ = 55403120500.

The previous prime is 55403120467. The next prime is 55403120503. The reversal of 55403120501 is 10502130455.

55403120501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33558576100 + 21844544401 = 183190^2 + 147799^2 .

It is a cyclic number.

It is not a de Polignac number, because 55403120501 - 2²⁶ = 55336011637 is a prime.

It is a super-2 number, since 2×55403120501² (a number of 22 digits) contains 22 as substring.

Together with 55403120503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55403120503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27701560250 + 27701560251.

It is an arithmetic number, because the mean of its divisors is an integer number (27701560251).

Almost surely, 2^55403120501 is an apocalyptic number.

It is an amenable number.

55403120501 is a deficient number, since it is larger than the sum of its proper divisors (1).

55403120501 is an equidigital number, since it uses as much as digits as its factorization.

55403120501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 55403120501 its reverse (10502130455), we get a palindrome (65905250956).

The spelling of 55403120501 in words is "fifty-five billion, four hundred three million, one hundred twenty thousand, five hundred one".