55181007 has 30 divisors (see below), whose sum is σ = 95895888. Its totient is φ = 31529736.

The previous prime is 55180967. The next prime is 55181017. The reversal of 55181007 is 70018155.

55181007 is a `hidden beast` number, since 551 + 8 + 100 + 7 = 666.

It is not a de Polignac number, because 55181007 - 2⁶ = 55180943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55181017) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2983 + ... + 10920.

Almost surely, 2^55181007 is an apocalyptic number.

55181007 is a deficient number, since it is larger than the sum of its proper divisors (40714881).

55181007 is a wasteful number, since it uses less digits than its factorization.

55181007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13929 (or 13913 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 55181007 is about 7428.3919525022. The cubic root of 55181007 is about 380.7119777448.

The spelling of 55181007 in words is "fifty-five million, one hundred eighty-one thousand, seven".