1550401005 has 16 divisors (see below), whose sum is σ = 2505204864. Its totient is φ = 818692800.

The previous prime is 1550401001. The next prime is 1550401031. The reversal of 1550401005 is 5001040551.

It is not a de Polignac number, because 1550401005 - 2² = 1550401001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550401001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510169 + ... + 513198.

It is an arithmetic number, because the mean of its divisors is an integer number (156575304).

Almost surely, 2^1550401005 is an apocalyptic number.

1550401005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1550401005 is a deficient number, since it is larger than the sum of its proper divisors (954803859).

1550401005 is a wasteful number, since it uses less digits than its factorization.

1550401005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023476.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 1550401005 is about 39375.1318093032. The cubic root of 1550401005 is about 1157.3943209998.

Adding to 1550401005 its reverse (5001040551), we get a palindrome (6551441556).

The spelling of 1550401005 in words is "one billion, five hundred fifty million, four hundred one thousand, five".