55219826731 has 4 divisors (see below), whose sum is σ = 56504008792. Its totient is φ = 53935644672.

The previous prime is 55219826707. The next prime is 55219826741. The reversal of 55219826731 is 13762891255.

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 55219826731 - 2⁷ = 55219826603 is a prime.

It is a super-2 number, since 2×55219826731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55219826741) 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, 642090966 + ... + 642091051.

It is an arithmetic number, because the mean of its divisors is an integer number (14126002198).

Almost surely, 2^55219826731 is an apocalyptic number.

55219826731 is a deficient number, since it is larger than the sum of its proper divisors (1284182061).

55219826731 is a wasteful number, since it uses less digits than its factorization.

55219826731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284182060.

The product of its digits is 907200, while the sum is 49.

The spelling of 55219826731 in words is "fifty-five billion, two hundred nineteen million, eight hundred twenty-six thousand, seven hundred thirty-one".