55620511 has 2 divisors, whose sum is σ = 55620512. Its totient is φ = 55620510.

The previous prime is 55620473. The next prime is 55620529. The reversal of 55620511 is 11502655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55620511 - 2²¹ = 53523359 is a prime.

It is a super-2 number, since 2×55620511² = 6187282487802242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55620571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27810255 + 27810256.

It is an arithmetic number, because the mean of its divisors is an integer number (27810256).

Almost surely, 2^55620511 is an apocalyptic number.

55620511 is a deficient number, since it is larger than the sum of its proper divisors (1).

55620511 is an equidigital number, since it uses as much as digits as its factorization.

55620511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 55620511 is about 7457.9159957725. The cubic root of 55620511 is about 381.7200671094.

The spelling of 55620511 in words is "fifty-five million, six hundred twenty thousand, five hundred eleven".