513151442 has 4 divisors (see below), whose sum is σ = 769727166. Its totient is φ = 256575720.

The previous prime is 513151439. The next prime is 513151451. The reversal of 513151442 is 244151315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244151315 = 5 ⋅48830263.

It can be written as a sum of positive squares in only one way, i.e., 437269921 + 75881521 = 20911^2 + 8711^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128287859 + ... + 128287862.

Almost surely, 2^513151442 is an apocalyptic number.

513151442 is a deficient number, since it is larger than the sum of its proper divisors (256575724).

513151442 is a wasteful number, since it uses less digits than its factorization.

513151442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256575723.

The product of its digits is 2400, while the sum is 26.

The square root of 513151442 is about 22652.8462229363. The cubic root of 513151442 is about 800.5992603717.

The spelling of 513151442 in words is "five hundred thirteen million, one hundred fifty-one thousand, four hundred forty-two".