55431432040 has 32 divisors (see below), whose sum is σ = 124779168360. Its totient is φ = 22162182400.

The previous prime is 55431431999. The next prime is 55431432047. The reversal of 55431432040 is 4023413455.

It can be written as a sum of positive squares in 4 ways, for example, as 45044968644 + 10386463396 = 212238^2 + 101914^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55431431993 and 55431432011.

It is not an unprimeable number, because it can be changed into a prime (55431432047) 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, 237991 + ... + 409270.

Almost surely, 2^55431432040 is an apocalyptic number.

It is an amenable number.

55431432040 is an abundant number, since it is smaller than the sum of its proper divisors (69347736320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55431432040 is a wasteful number, since it uses less digits than its factorization.

55431432040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649413 (or 649409 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 55431432040 its reverse (4023413455), we get a palindrome (59454845495).

The spelling of 55431432040 in words is "fifty-five billion, four hundred thirty-one million, four hundred thirty-two thousand, forty".