1521156116 has 6 divisors (see below), whose sum is σ = 2662023210. Its totient is φ = 760578056.

The previous prime is 1521156101. The next prime is 1521156137. The reversal of 1521156116 is 6116511251.

It can be written as a sum of positive squares in only one way, i.e., 957283600 + 563872516 = 30940^2 + 23746^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 190144511 + ... + 190144518.

It is an arithmetic number, because the mean of its divisors is an integer number (443670535).

Almost surely, 2^1521156116 is an apocalyptic number.

It is an amenable number.

1521156116 is a deficient number, since it is larger than the sum of its proper divisors (1140867094).

1521156116 is a wasteful number, since it uses less digits than its factorization.

1521156116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380289033 (or 380289031 counting only the distinct ones).

The product of its digits is 1800, while the sum is 29.

The square root of 1521156116 is about 39002.0014358238. The cubic root of 1521156116 is about 1150.0708503293.

Adding to 1521156116 its reverse (6116511251), we get a palindrome (7637667367).

The spelling of 1521156116 in words is "one billion, five hundred twenty-one million, one hundred fifty-six thousand, one hundred sixteen".