55181607 has 8 divisors (see below), whose sum is σ = 79235184. Its totient is φ = 33957888.

The previous prime is 55181603. The next prime is 55181611. The reversal of 55181607 is 70618155.

It is an interprime number because it is at equal distance from previous prime (55181603) and next prime (55181611).

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

It is not a de Polignac number, because 55181607 - 2² = 55181603 is a prime.

It is a super-2 number, since 2×55181607² = 6090019502204898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55181603) 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, 707418 + ... + 707495.

It is an arithmetic number, because the mean of its divisors is an integer number (9904398).

Almost surely, 2^55181607 is an apocalyptic number.

55181607 is a deficient number, since it is larger than the sum of its proper divisors (24053577).

55181607 is a wasteful number, since it uses less digits than its factorization.

55181607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414929.

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

The square root of 55181607 is about 7428.4323379836. The cubic root of 55181607 is about 380.7133576058.

The spelling of 55181607 in words is "fifty-five million, one hundred eighty-one thousand, six hundred seven".