55996381 has 8 divisors (see below), whose sum is σ = 64229120. Its totient is φ = 47821968.

The previous prime is 55996379. The next prime is 55996393. The reversal of 55996381 is 18369955.

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

It is a cyclic number.

It is not a de Polignac number, because 55996381 - 2¹ = 55996379 is a prime.

It is a super-2 number, since 2×55996381² = 6271189370194322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55996301) 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, 12501 + ... + 16378.

It is an arithmetic number, because the mean of its divisors is an integer number (8028640).

Almost surely, 2^55996381 is an apocalyptic number.

It is an amenable number.

55996381 is a deficient number, since it is larger than the sum of its proper divisors (8232739).

55996381 is a wasteful number, since it uses less digits than its factorization.

55996381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29163.

The product of its digits is 291600, while the sum is 46.

The square root of 55996381 is about 7483.0729650325. The cubic root of 55996381 is about 382.5779948318.

The spelling of 55996381 in words is "fifty-five million, nine hundred ninety-six thousand, three hundred eighty-one".