55131201566 has 16 divisors (see below), whose sum is σ = 94513849056. Its totient is φ = 23626853376.

The previous prime is 55131201551. The next prime is 55131201611. The reversal of 55131201566 is 66510213155.

It is a super-3 number, since 3×55131201566³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563090 + ... + 653706.

It is an arithmetic number, because the mean of its divisors is an integer number (5907115566).

Almost surely, 2^55131201566 is an apocalyptic number.

55131201566 is a deficient number, since it is larger than the sum of its proper divisors (39382647490).

55131201566 is a wasteful number, since it uses less digits than its factorization.

55131201566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134083.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 55131201566 in words is "fifty-five billion, one hundred thirty-one million, two hundred one thousand, five hundred sixty-six".