55322791 has 4 divisors (see below), whose sum is σ = 56229784. Its totient is φ = 54415800.

The previous prime is 55322789. The next prime is 55322819. The reversal of 55322791 is 19722355.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55322791 - 2¹ = 55322789 is a prime.

It is a super-2 number, since 2×55322791² = 6121222408059362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55322711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453405 + ... + 453526.

It is an arithmetic number, because the mean of its divisors is an integer number (14057446).

Almost surely, 2^55322791 is an apocalyptic number.

55322791 is a deficient number, since it is larger than the sum of its proper divisors (906993).

55322791 is an equidigital number, since it uses as much as digits as its factorization.

55322791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906992.

The product of its digits is 18900, while the sum is 34.

The square root of 55322791 is about 7437.9292145059. The cubic root of 55322791 is about 381.0377704051.

The spelling of 55322791 in words is "fifty-five million, three hundred twenty-two thousand, seven hundred ninety-one".