55622681 has 2 divisors, whose sum is σ = 55622682. Its totient is φ = 55622680.

The previous prime is 55622647. The next prime is 55622683. The reversal of 55622681 is 18622655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37210000 + 18412681 = 6100^2 + 4291^2 .

It is a cyclic number.

It is not a de Polignac number, because 55622681 - 2¹⁴ = 55606297 is a prime.

It is a super-2 number, since 2×55622681² = 6187765283255522, which contains 22 as substring.

Together with 55622683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55622683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27811340 + 27811341.

It is an arithmetic number, because the mean of its divisors is an integer number (27811341).

Almost surely, 2^55622681 is an apocalyptic number.

It is an amenable number.

55622681 is a deficient number, since it is larger than the sum of its proper divisors (1).

55622681 is an equidigital number, since it uses as much as digits as its factorization.

55622681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 35.

The square root of 55622681 is about 7458.0614773546. The cubic root of 55622681 is about 381.7250312360.

The spelling of 55622681 in words is "fifty-five million, six hundred twenty-two thousand, six hundred eighty-one".