315221054 has 4 divisors (see below), whose sum is σ = 472831584. Its totient is φ = 157610526.

The previous prime is 315221047. The next prime is 315221059. The reversal of 315221054 is 450122513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 450122513 = 193 ⋅2332241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315221059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78805262 + ... + 78805265.

It is an arithmetic number, because the mean of its divisors is an integer number (118207896).

Almost surely, 2^315221054 is an apocalyptic number.

315221054 is a deficient number, since it is larger than the sum of its proper divisors (157610530).

315221054 is a wasteful number, since it uses less digits than its factorization.

315221054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157610529.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 315221054 is about 17754.4657480872. The cubic root of 315221054 is about 680.5683354137.

Adding to 315221054 its reverse (450122513), we get a palindrome (765343567).

The spelling of 315221054 in words is "three hundred fifteen million, two hundred twenty-one thousand, fifty-four".