315123542 has 4 divisors (see below), whose sum is σ = 472685316. Its totient is φ = 157561770.

The previous prime is 315123517. The next prime is 315123559. The reversal of 315123542 is 245321513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245321513 = 9133 ⋅26861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78780884 + ... + 78780887.

It is an arithmetic number, because the mean of its divisors is an integer number (118171329).

Almost surely, 2^315123542 is an apocalyptic number.

315123542 is a deficient number, since it is larger than the sum of its proper divisors (157561774).

315123542 is a wasteful number, since it uses less digits than its factorization.

315123542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157561773.

The product of its digits is 3600, while the sum is 26.

The square root of 315123542 is about 17751.7194096797. The cubic root of 315123542 is about 680.4981514133.

The spelling of 315123542 in words is "three hundred fifteen million, one hundred twenty-three thousand, five hundred forty-two".