1550420440231 has 8 divisors (see below), whose sum is σ = 1669693554144. Its totient is φ = 1431148755360.

The previous prime is 1550420440183. The next prime is 1550420440237. The reversal of 1550420440231 is 1320440240551.

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 1550420440231 - 2⁹ = 1550420439719 is a prime.

It is a super-2 number, since 2×1550420440231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1550420440193 and 1550420440202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550420440237) 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, 3230790 + ... + 3679516.

It is an arithmetic number, because the mean of its divisors is an integer number (208711694268).

Almost surely, 2^{1550420440231} is an apocalyptic number.

1550420440231 is a deficient number, since it is larger than the sum of its proper divisors (119273113913).

1550420440231 is a wasteful number, since it uses less digits than its factorization.

1550420440231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714521.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 1550420440231 its reverse (1320440240551), we get a palindrome (2870860680782).

The spelling of 1550420440231 in words is "one trillion, five hundred fifty billion, four hundred twenty million, four hundred forty thousand, two hundred thirty-one".