201312351615 has 16 divisors (see below), whose sum is σ = 325718863200. Its totient is φ = 106160220672.

The previous prime is 201312351571. The next prime is 201312351619. The reversal of 201312351615 is 516153213102.

It is not a de Polignac number, because 201312351615 - 2¹³ = 201312343423 is a prime.

It is a super-2 number, since 2×201312351615² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201312351619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75396550 + ... + 75399219.

It is an arithmetic number, because the mean of its divisors is an integer number (20357428950).

Almost surely, 2^201312351615 is an apocalyptic number.

201312351615 is a deficient number, since it is larger than the sum of its proper divisors (124406511585).

201312351615 is a wasteful number, since it uses less digits than its factorization.

201312351615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150795866.

The product of its (nonzero) digits is 5400, while the sum is 30.

Adding to 201312351615 its reverse (516153213102), we get a palindrome (717465564717).

The spelling of 201312351615 in words is "two hundred one billion, three hundred twelve million, three hundred fifty-one thousand, six hundred fifteen".