315212245021 has 8 divisors (see below), whose sum is σ = 331857120320. Its totient is φ = 298572845472.

The previous prime is 315212245001. The next prime is 315212245043. The reversal of 315212245021 is 120542212513.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 315212245021 - 2¹⁵ = 315212212253 is a prime.

It is a super-2 number, since 2×315212245021² (a number of 24 digits) 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 (315212245001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1250505 + ... + 1481278.

It is an arithmetic number, because the mean of its divisors is an integer number (41482140040).

Almost surely, 2^315212245021 is an apocalyptic number.

It is an amenable number.

315212245021 is a deficient number, since it is larger than the sum of its proper divisors (16644875299).

315212245021 is a wasteful number, since it uses less digits than its factorization.

315212245021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737875.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 315212245021 its reverse (120542212513), we get a palindrome (435754457534).

The spelling of 315212245021 in words is "three hundred fifteen billion, two hundred twelve million, two hundred forty-five thousand, twenty-one".