315221001245 has 16 divisors (see below), whose sum is σ = 390625417728. Its totient is φ = 243943245120.

The previous prime is 315221001241. The next prime is 315221001253. The reversal of 315221001245 is 542100122513.

It is not a de Polignac number, because 315221001245 - 2² = 315221001241 is a prime.

It is a super-3 number, since 3×315221001245³ (a number of 35 digits) contains 333 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 (315221001241) 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, 26579 + ... + 794448.

It is an arithmetic number, because the mean of its divisors is an integer number (24414088608).

Almost surely, 2^315221001245 is an apocalyptic number.

It is an amenable number.

315221001245 is a deficient number, since it is larger than the sum of its proper divisors (75404416483).

315221001245 is a wasteful number, since it uses less digits than its factorization.

315221001245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823540.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 315221001245 its reverse (542100122513), we get a palindrome (857321123758).

The spelling of 315221001245 in words is "three hundred fifteen billion, two hundred twenty-one million, one thousand, two hundred forty-five".