55533787 has 2 divisors, whose sum is σ = 55533788. Its totient is φ = 55533786.

The previous prime is 55533773. The next prime is 55533817. The reversal of 55533787 is 78733555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55533787 - 2⁷ = 55533659 is a prime.

It is a super-2 number, since 2×55533787² = 6168002997122738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55533767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27766893 + 27766894.

It is an arithmetic number, because the mean of its divisors is an integer number (27766894).

Almost surely, 2^55533787 is an apocalyptic number.

55533787 is a deficient number, since it is larger than the sum of its proper divisors (1).

55533787 is an equidigital number, since it uses as much as digits as its factorization.

55533787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 441000, while the sum is 43.

The square root of 55533787 is about 7452.0995028247. The cubic root of 55533787 is about 381.5215701225.

The spelling of 55533787 in words is "fifty-five million, five hundred thirty-three thousand, seven hundred eighty-seven".