55305621431 has 8 divisors (see below), whose sum is σ = 55482068880. Its totient is φ = 55129454848.

The previous prime is 55305621419. The next prime is 55305621461. The reversal of 55305621431 is 13412650355.

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 55305621431 - 2¹⁸ = 55305359287 is a prime.

It is a super-2 number, since 2×55305621431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55305621391 and 55305621400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55305621461) 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, 327815 + ... + 466983.

It is an arithmetic number, because the mean of its divisors is an integer number (6935258610).

Almost surely, 2^55305621431 is an apocalyptic number.

55305621431 is a deficient number, since it is larger than the sum of its proper divisors (176447449).

55305621431 is a wasteful number, since it uses less digits than its factorization.

55305621431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140433.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 55305621431 in words is "fifty-five billion, three hundred five million, six hundred twenty-one thousand, four hundred thirty-one".