2015401550 has 12 divisors (see below), whose sum is σ = 3748646976. Its totient is φ = 806160600.

The previous prime is 2015401547. The next prime is 2015401589. The reversal of 2015401550 is 551045102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20153966 + ... + 20154065.

It is an arithmetic number, because the mean of its divisors is an integer number (312387248).

Almost surely, 2^2015401550 is an apocalyptic number.

2015401550 is a deficient number, since it is larger than the sum of its proper divisors (1733245426).

2015401550 is a wasteful number, since it uses less digits than its factorization.

2015401550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40308043 (or 40308038 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2015401550 is about 44893.2238762154. The cubic root of 2015401550 is about 1263.1469063204.

Adding to 2015401550 its reverse (551045102), we get a palindrome (2566446652).

The spelling of 2015401550 in words is "two billion, fifteen million, four hundred one thousand, five hundred fifty".