55243602381 has 32 divisors (see below), whose sum is σ = 81116928000. Its totient is φ = 33163603200.

The previous prime is 55243602371. The next prime is 55243602419. The reversal of 55243602381 is 18320634255.

It is a happy number.

It is not a de Polignac number, because 55243602381 - 2⁶ = 55243602317 is a prime.

It is a super-2 number, since 2×55243602381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55243602311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7450566 + ... + 7457976.

It is an arithmetic number, because the mean of its divisors is an integer number (2534904000).

Almost surely, 2^55243602381 is an apocalyptic number.

It is an amenable number.

55243602381 is a deficient number, since it is larger than the sum of its proper divisors (25873325619).

55243602381 is a wasteful number, since it uses less digits than its factorization.

55243602381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9537.

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 55243602381 in words is "fifty-five billion, two hundred forty-three million, six hundred two thousand, three hundred eighty-one".