1550442004431 has 16 divisors (see below), whose sum is σ = 2090653908480. Its totient is φ = 1021930944320.

The previous prime is 1550442004429. The next prime is 1550442004471. The reversal of 1550442004431 is 1344002440551.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1550442004431 - 2¹ = 1550442004429 is a prime.

It is a super-2 number, since 2×1550442004431² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1550442004392 and 1550442004401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550442004411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3136906 + ... + 3597368.

It is an arithmetic number, because the mean of its divisors is an integer number (130665869280).

Almost surely, 2^{1550442004431} is an apocalyptic number.

1550442004431 is a deficient number, since it is larger than the sum of its proper divisors (540211904049).

1550442004431 is a wasteful number, since it uses less digits than its factorization.

1550442004431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473166.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 1550442004431 its reverse (1344002440551), we get a palindrome (2894444444982).

The spelling of 1550442004431 in words is "one trillion, five hundred fifty billion, four hundred forty-two million, four thousand, four hundred thirty-one".