813151442 has 16 divisors (see below), whose sum is σ = 1283251032. Its totient is φ = 385937280.

The previous prime is 813151433. The next prime is 813151477. The reversal of 813151442 is 244151318.

It can be written as a sum of positive squares in 4 ways, for example, as 709742881 + 103408561 = 26641^2 + 10169^2 .

It is a super-2 number, since 2×813151442² = 1322430535253358728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130973 + ... + 137040.

Almost surely, 2^813151442 is an apocalyptic number.

813151442 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

813151442 is a deficient number, since it is larger than the sum of its proper divisors (470099590).

813151442 is a wasteful number, since it uses less digits than its factorization.

813151442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268093.

The product of its digits is 3840, while the sum is 29.

The square root of 813151442 is about 28515.8103865207. The cubic root of 813151442 is about 933.3771086894.

The spelling of 813151442 in words is "eight hundred thirteen million, one hundred fifty-one thousand, four hundred forty-two".