315215152442 has 4 divisors (see below), whose sum is σ = 472822728666. Its totient is φ = 157607576220.

The previous prime is 315215152423. The next prime is 315215152453. The reversal of 315215152442 is 244251512513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244251512513 = 89 ⋅2744399017.

It can be written as a sum of positive squares in only one way, i.e., 315193539241 + 21613201 = 561421^2 + 4649^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78803788109 + ... + 78803788112.

Almost surely, 2^315215152442 is an apocalyptic number.

315215152442 is a deficient number, since it is larger than the sum of its proper divisors (157607576224).

315215152442 is a wasteful number, since it uses less digits than its factorization.

315215152442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157607576223.

The product of its digits is 48000, while the sum is 35.

Adding to 315215152442 its reverse (244251512513), we get a palindrome (559466664955).

The spelling of 315215152442 in words is "three hundred fifteen billion, two hundred fifteen million, one hundred fifty-two thousand, four hundred forty-two".