55789951 has 4 divisors (see below), whose sum is σ = 63759952. Its totient is φ = 47819952.

The previous prime is 55789949. The next prime is 55789967. The reversal of 55789951 is 15998755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15998755 = 5 ⋅3199751.

It is a cyclic number.

It is not a de Polignac number, because 55789951 - 2¹ = 55789949 is a prime.

It is a super-2 number, since 2×55789951² = 6225037265164802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55789895 and 55789904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55789351) 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, 3984990 + ... + 3985003.

It is an arithmetic number, because the mean of its divisors is an integer number (15939988).

Almost surely, 2^55789951 is an apocalyptic number.

55789951 is a deficient number, since it is larger than the sum of its proper divisors (7970001).

55789951 is an equidigital number, since it uses as much as digits as its factorization.

55789951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7970000.

The product of its digits is 567000, while the sum is 49.

The square root of 55789951 is about 7469.2670992541. The cubic root of 55789951 is about 382.1072928517.

The spelling of 55789951 in words is "fifty-five million, seven hundred eighty-nine thousand, nine hundred fifty-one".