55501903 has 2 divisors, whose sum is σ = 55501904. Its totient is φ = 55501902.

The previous prime is 55501883. The next prime is 55501909. The reversal of 55501903 is 30910555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55501903 is a prime.

It is a super-2 number, since 2×55501903² = 6160922473242818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55501909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750951 + 27750952.

It is an arithmetic number, because the mean of its divisors is an integer number (27750952).

Almost surely, 2^55501903 is an apocalyptic number.

55501903 is a deficient number, since it is larger than the sum of its proper divisors (1).

55501903 is an equidigital number, since it uses as much as digits as its factorization.

55501903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3375, while the sum is 28.

The square root of 55501903 is about 7449.9599327782. The cubic root of 55501903 is about 381.4485409322.

The spelling of 55501903 in words is "fifty-five million, five hundred one thousand, nine hundred three".