55055731 has 2 divisors, whose sum is σ = 55055732. Its totient is φ = 55055730.

The previous prime is 55055729. The next prime is 55055821. The reversal of 55055731 is 13755055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55055731 - 2¹ = 55055729 is a prime.

It is a super-2 number, since 2×55055731² = 6062267031888722, which contains 22 as substring.

Together with 55055729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 55055693 and 55055702.

It is not a weakly prime, because it can be changed into another prime (55055701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27527865 + 27527866.

It is an arithmetic number, because the mean of its divisors is an integer number (27527866).

Almost surely, 2^55055731 is an apocalyptic number.

55055731 is a deficient number, since it is larger than the sum of its proper divisors (1).

55055731 is an equidigital number, since it uses as much as digits as its factorization.

55055731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13125, while the sum is 31.

The square root of 55055731 is about 7419.9549190005. The cubic root of 55055731 is about 380.4236526200.

It can be divided in two parts, 5505 and 5731, that added together give a square (11236 = 106²).

The spelling of 55055731 in words is "fifty-five million, fifty-five thousand, seven hundred thirty-one".