55623333431 has 4 divisors (see below), whose sum is σ = 55914555264. Its totient is φ = 55332111600.

The previous prime is 55623333427. The next prime is 55623333439. The reversal of 55623333431 is 13433332655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55623333431 - 2² = 55623333427 is a prime.

It is a super-2 number, since 2×55623333431² (a number of 22 digits) 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 (55623333439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145610630 + ... + 145611011.

It is an arithmetic number, because the mean of its divisors is an integer number (13978638816).

Almost surely, 2^55623333431 is an apocalyptic number.

55623333431 is a deficient number, since it is larger than the sum of its proper divisors (291221833).

55623333431 is a wasteful number, since it uses less digits than its factorization.

55623333431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291221832.

The product of its digits is 291600, while the sum is 38.

The spelling of 55623333431 in words is "fifty-five billion, six hundred twenty-three million, three hundred thirty-three thousand, four hundred thirty-one".