55442040431 has 8 divisors (see below), whose sum is σ = 57900763104. Its totient is φ = 52987334400.

The previous prime is 55442040421. The next prime is 55442040461. The reversal of 55442040431 is 13404024455.

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 55442040431 - 2¹⁴ = 55442024047 is a prime.

It is a super-2 number, since 2×55442040431² (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 (55442040421) 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, 975926 + ... + 1031171.

It is an arithmetic number, because the mean of its divisors is an integer number (7237595388).

Almost surely, 2^55442040431 is an apocalyptic number.

55442040431 is a deficient number, since it is larger than the sum of its proper divisors (2458722673).

55442040431 is a wasteful number, since it uses less digits than its factorization.

55442040431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008321.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 55442040431 its reverse (13404024455), we get a palindrome (68846064886).

The spelling of 55442040431 in words is "fifty-five billion, four hundred forty-two million, forty thousand, four hundred thirty-one".