55533433531 has 2 divisors, whose sum is σ = 55533433532. Its totient is φ = 55533433530.

The previous prime is 55533433519. The next prime is 55533433597. The reversal of 55533433531 is 13533433555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55533433531 - 2²³ = 55525044923 is a prime.

It is a super-2 number, since 2×55533433531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55533433031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27766716765 + 27766716766.

It is an arithmetic number, because the mean of its divisors is an integer number (27766716766).

Almost surely, 2^55533433531 is an apocalyptic number.

55533433531 is a deficient number, since it is larger than the sum of its proper divisors (1).

55533433531 is an equidigital number, since it uses as much as digits as its factorization.

55533433531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 607500, while the sum is 40.

The spelling of 55533433531 in words is "fifty-five billion, five hundred thirty-three million, four hundred thirty-three thousand, five hundred thirty-one".