55367621 has 2 divisors, whose sum is σ = 55367622. Its totient is φ = 55367620.

The previous prime is 55367603. The next prime is 55367639. The reversal of 55367621 is 12676355.

It is a balanced prime because it is at equal distance from previous prime (55367603) and next prime (55367639).

It can be written as a sum of positive squares in only one way, i.e., 55338721 + 28900 = 7439^2 + 170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55367621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55367021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27683810 + 27683811.

It is an arithmetic number, because the mean of its divisors is an integer number (27683811).

Almost surely, 2^55367621 is an apocalyptic number.

It is an amenable number.

55367621 is a deficient number, since it is larger than the sum of its proper divisors (1).

55367621 is an equidigital number, since it uses as much as digits as its factorization.

55367621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 35.

The square root of 55367621 is about 7440.9422118439. The cubic root of 55367621 is about 381.1406653784.

The spelling of 55367621 in words is "fifty-five million, three hundred sixty-seven thousand, six hundred twenty-one".