55510531 has 4 divisors (see below), whose sum is σ = 55570464. Its totient is φ = 55450600.

The previous prime is 55510529. The next prime is 55510541. The reversal of 55510531 is 13501555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55510531 - 2¹ = 55510529 is a prime.

It is a super-2 number, since 2×55510531² = 6162838103803922, 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 = 55510496 and 55510505.

It is not an unprimeable number, because it can be changed into a prime (55510501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28555 + ... + 30436.

It is an arithmetic number, because the mean of its divisors is an integer number (13892616).

Almost surely, 2^55510531 is an apocalyptic number.

55510531 is a deficient number, since it is larger than the sum of its proper divisors (59933).

55510531 is an equidigital number, since it uses as much as digits as its factorization.

55510531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59932.

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 55510531 is about 7450.5389737924. The cubic root of 55510531 is about 381.4683058250.

The spelling of 55510531 in words is "fifty-five million, five hundred ten thousand, five hundred thirty-one".