55396291 has 2 divisors, whose sum is σ = 55396292. Its totient is φ = 55396290.

The previous prime is 55396277. The next prime is 55396309. The reversal of 55396291 is 19269355.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55396291 - 2¹¹ = 55394243 is a prime.

It is not a weakly prime, because it can be changed into another prime (55396391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27698145 + 27698146.

It is an arithmetic number, because the mean of its divisors is an integer number (27698146).

Almost surely, 2^55396291 is an apocalyptic number.

55396291 is a deficient number, since it is larger than the sum of its proper divisors (1).

55396291 is an equidigital number, since it uses as much as digits as its factorization.

55396291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 40.

The square root of 55396291 is about 7442.8684658537. The cubic root of 55396291 is about 381.2064403874.

The spelling of 55396291 in words is "fifty-five million, three hundred ninety-six thousand, two hundred ninety-one".