1315336021 has 4 divisors (see below), whose sum is σ = 1316407500. Its totient is φ = 1314264544.

The previous prime is 1315336013. The next prime is 1315336039. The reversal of 1315336021 is 1206335131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1098922500 + 216413521 = 33150^2 + 14711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315336021 - 2³ = 1315336013 is a prime.

It is a super-2 number, since 2×1315336021² = 3460217696280224882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315336721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533896 + ... + 536353.

It is an arithmetic number, because the mean of its divisors is an integer number (329101875).

Almost surely, 2^1315336021 is an apocalyptic number.

It is an amenable number.

1315336021 is a deficient number, since it is larger than the sum of its proper divisors (1071479).

1315336021 is a wasteful number, since it uses less digits than its factorization.

1315336021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071478.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1315336021 is about 36267.5615529911. The cubic root of 1315336021 is about 1095.6678150075.

The spelling of 1315336021 in words is "one billion, three hundred fifteen million, three hundred thirty-six thousand, twenty-one".