55031489 has 4 divisors (see below), whose sum is σ = 55048020. Its totient is φ = 55014960.

The previous prime is 55031477. The next prime is 55031503. The reversal of 55031489 is 98413055.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19509889 + 35521600 = 4417^2 + 5960^2 .

It is a cyclic number.

It is not a de Polignac number, because 55031489 - 2²⁴ = 38254273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55031419) 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, 1334 + ... + 10575.

It is an arithmetic number, because the mean of its divisors is an integer number (13762005).

Almost surely, 2^55031489 is an apocalyptic number.

It is an amenable number.

55031489 is a deficient number, since it is larger than the sum of its proper divisors (16531).

55031489 is a wasteful number, since it uses less digits than its factorization.

55031489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16530.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 55031489 is about 7418.3211712624. The cubic root of 55031489 is about 380.3678086966.

The spelling of 55031489 in words is "fifty-five million, thirty-one thousand, four hundred eighty-nine".