55107681 has 8 divisors (see below), whose sum is σ = 73531584. Its totient is φ = 36711120.

The previous prime is 55107653. The next prime is 55107691. The reversal of 55107681 is 18670155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55107681 - 2⁶ = 55107617 is a prime.

It is a super-2 number, since 2×55107681² = 6073713010395522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55107631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1546 + ... + 10611.

It is an arithmetic number, because the mean of its divisors is an integer number (9191448).

Almost surely, 2^55107681 is an apocalyptic number.

It is an amenable number.

55107681 is a deficient number, since it is larger than the sum of its proper divisors (18423903).

55107681 is a wasteful number, since it uses less digits than its factorization.

55107681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13671.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 55107681 is about 7423.4547887086. The cubic root of 55107681 is about 380.5432695706.

The spelling of 55107681 in words is "fifty-five million, one hundred seven thousand, six hundred eighty-one".