55603157 has 2 divisors, whose sum is σ = 55603158. Its totient is φ = 55603156.

The previous prime is 55603127. The next prime is 55603159. The reversal of 55603157 is 75130655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52867441 + 2735716 = 7271^2 + 1654^2 .

It is a cyclic number.

It is not a de Polignac number, because 55603157 - 2⁸ = 55602901 is a prime.

It is a super-2 number, since 2×55603157² = 6183422136733298, which contains 22 as substring.

Together with 55603159, 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 (55603159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27801578 + 27801579.

It is an arithmetic number, because the mean of its divisors is an integer number (27801579).

Almost surely, 2^55603157 is an apocalyptic number.

It is an amenable number.

55603157 is a deficient number, since it is larger than the sum of its proper divisors (1).

55603157 is an equidigital number, since it uses as much as digits as its factorization.

55603157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 55603157 is about 7456.7524432557. The cubic root of 55603157 is about 381.6803631764.

The spelling of 55603157 in words is "fifty-five million, six hundred three thousand, one hundred fifty-seven".