253815442 has 8 divisors (see below), whose sum is σ = 397276416. Its totient is φ = 121389972.

The previous prime is 253815439. The next prime is 253815493. The reversal of 253815442 is 244518352.

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

It is a junction number, because it is equal to n+sod(n) for n = 253815398 and 253815407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2758818 + ... + 2758909.

It is an arithmetic number, because the mean of its divisors is an integer number (49659552).

Almost surely, 2^253815442 is an apocalyptic number.

253815442 is a deficient number, since it is larger than the sum of its proper divisors (143460974).

253815442 is a wasteful number, since it uses less digits than its factorization.

253815442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517752.

The product of its digits is 38400, while the sum is 34.

The square root of 253815442 is about 15931.5862989220. The cubic root of 253815442 is about 633.1491287624.

The spelling of 253815442 in words is "two hundred fifty-three million, eight hundred fifteen thousand, four hundred forty-two".