55261879 has 2 divisors, whose sum is σ = 55261880. Its totient is φ = 55261878.

The previous prime is 55261841. The next prime is 55261889. The reversal of 55261879 is 97816255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55261879 - 2¹⁷ = 55130807 is a prime.

It is a super-2 number, since 2×55261879² = 6107750541221282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55261889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27630939 + 27630940.

It is an arithmetic number, because the mean of its divisors is an integer number (27630940).

Almost surely, 2^55261879 is an apocalyptic number.

55261879 is a deficient number, since it is larger than the sum of its proper divisors (1).

55261879 is an equidigital number, since it uses as much as digits as its factorization.

55261879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 55261879 is about 7433.8333987250. The cubic root of 55261879 is about 380.8978744980.

The spelling of 55261879 in words is "fifty-five million, two hundred sixty-one thousand, eight hundred seventy-nine".