1015550401 has 4 divisors (see below), whose sum is σ = 1027786032. Its totient is φ = 1003314772.

The previous prime is 1015550381. The next prime is 1015550411. The reversal of 1015550401 is 1040555101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1040555101 = 331 ⋅3143671.

It is a cyclic number.

It is not a de Polignac number, because 1015550401 - 2⁷ = 1015550273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1015550411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6117691 + ... + 6117856.

It is an arithmetic number, because the mean of its divisors is an integer number (256946508).

Almost surely, 2^1015550401 is an apocalyptic number.

It is an amenable number.

1015550401 is a deficient number, since it is larger than the sum of its proper divisors (12235631).

1015550401 is an equidigital number, since it uses as much as digits as its factorization.

1015550401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12235630.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1015550401 is about 31867.7015330569. The cubic root of 1015550401 is about 1005.1568284091.

The spelling of 1015550401 in words is "one billion, fifteen million, five hundred fifty thousand, four hundred one".