55671907 has 4 divisors (see below), whose sum is σ = 56223216. Its totient is φ = 55120600.

The previous prime is 55671893. The next prime is 55671911. The reversal of 55671907 is 70917655.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55671907 is a prime.

It is a super-2 number, since 2×55671907² = 6198722458033298, which contains 22 as substring.

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 55671907.

It is not an unprimeable number, because it can be changed into a prime (55671947) 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, 275503 + ... + 275704.

It is an arithmetic number, because the mean of its divisors is an integer number (14055804).

Almost surely, 2^55671907 is an apocalyptic number.

55671907 is a deficient number, since it is larger than the sum of its proper divisors (551309).

55671907 is a wasteful number, since it uses less digits than its factorization.

55671907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551308.

The product of its (nonzero) digits is 66150, while the sum is 40.

The square root of 55671907 is about 7461.3609348429. The cubic root of 55671907 is about 381.8376067507.

The spelling of 55671907 in words is "fifty-five million, six hundred seventy-one thousand, nine hundred seven".