55231047 has 24 divisors (see below), whose sum is σ = 83308160. Its totient is φ = 35225280.

The previous prime is 55231039. The next prime is 55231061. The reversal of 55231047 is 74013255.

It is a happy number.

55231047 is a `hidden beast` number, since 552 + 3 + 104 + 7 = 666.

It is not a de Polignac number, because 55231047 - 2³ = 55231039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55231047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55231087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18954 + ... + 21672.

Almost surely, 2^55231047 is an apocalyptic number.

55231047 is a deficient number, since it is larger than the sum of its proper divisors (28077113).

55231047 is a wasteful number, since it uses less digits than its factorization.

55231047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823 (or 2820 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 55231047 is about 7431.7593475569. The cubic root of 55231047 is about 380.8270238006.

The spelling of 55231047 in words is "fifty-five million, two hundred thirty-one thousand, forty-seven".