2015401156 has 24 divisors (see below), whose sum is σ = 3553200000. Its totient is φ = 1000226304.

The previous prime is 2015401147. The next prime is 2015401159. The reversal of 2015401156 is 6511045102.

It is a happy number.

It is a super-2 number, since 2×2015401156² = 8123683639212272672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2015401156.

It is not an unprimeable number, because it can be changed into a prime (2015401159) 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 7 ways as a sum of consecutive naturals, for example, 354585 + ... + 360223.

It is an arithmetic number, because the mean of its divisors is an integer number (148050000).

Almost surely, 2^2015401156 is an apocalyptic number.

It is an amenable number.

2015401156 is a deficient number, since it is larger than the sum of its proper divisors (1537798844).

2015401156 is a wasteful number, since it uses less digits than its factorization.

2015401156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6291 (or 6289 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 2015401156 is about 44893.2194880251. The cubic root of 2015401156 is about 1263.1468240076.

Adding to 2015401156 its reverse (6511045102), we get a palindrome (8526446258).

The spelling of 2015401156 in words is "two billion, fifteen million, four hundred one thousand, one hundred fifty-six".