1315521110 has 16 divisors (see below), whose sum is σ = 2470892256. Its totient is φ = 503329728.

The previous prime is 1315521091. The next prime is 1315521131. The reversal of 1315521110 is 111255131.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2859599 + ... + 2860058.

It is an arithmetic number, because the mean of its divisors is an integer number (154430766).

Almost surely, 2^1315521110 is an apocalyptic number.

1315521110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1315521110 is a deficient number, since it is larger than the sum of its proper divisors (1155371146).

1315521110 is a wasteful number, since it uses less digits than its factorization.

1315521110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5719687.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 1315521110 is about 36270.1131787592. The cubic root of 1315521110 is about 1095.7192053102.

Adding to 1315521110 its reverse (111255131), we get a palindrome (1426776241).

The spelling of 1315521110 in words is "one billion, three hundred fifteen million, five hundred twenty-one thousand, one hundred ten".