55133396531 has 8 divisors (see below), whose sum is σ = 57828590880. Its totient is φ = 52463043072.

The previous prime is 55133396503. The next prime is 55133396537. The reversal of 55133396531 is 13569333155.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55133396531 is a prime.

It is a super-3 number, since 3×55133396531³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (55133396537) 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, 6205676 + ... + 6214553.

It is an arithmetic number, because the mean of its divisors is an integer number (7228573860).

Almost surely, 2^55133396531 is an apocalyptic number.

55133396531 is a deficient number, since it is larger than the sum of its proper divisors (2695194349).

55133396531 is a wasteful number, since it uses less digits than its factorization.

55133396531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12420445.

The product of its digits is 546750, while the sum is 44.

The spelling of 55133396531 in words is "fifty-five billion, one hundred thirty-three million, three hundred ninety-six thousand, five hundred thirty-one".