1457031218 has 4 divisors (see below), whose sum is σ = 2185546830. Its totient is φ = 728515608.

The previous prime is 1457031203. The next prime is 1457031241. The reversal of 1457031218 is 8121307541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1440733849 + 16297369 = 37957^2 + 4037^2 .

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 as a sum of consecutive naturals, namely, 364257803 + ... + 364257806.

Almost surely, 2^1457031218 is an apocalyptic number.

1457031218 is a deficient number, since it is larger than the sum of its proper divisors (728515612).

1457031218 is an equidigital number, since it uses as much as digits as its factorization.

1457031218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728515611.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1457031218 is about 38171.0782923407. The cubic root of 1457031218 is about 1133.6777392926.

Adding to 1457031218 its reverse (8121307541), we get a palindrome (9578338759).

The spelling of 1457031218 in words is "one billion, four hundred fifty-seven million, thirty-one thousand, two hundred eighteen".