1516003402 has 4 divisors (see below), whose sum is σ = 2274005106. Its totient is φ = 758001700.

The previous prime is 1516003387. The next prime is 1516003427. The reversal of 1516003402 is 2043006151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2043006151 = 1373 ⋅1487987.

It can be written as a sum of positive squares in only one way, i.e., 1018311921 + 497691481 = 31911^2 + 22309^2 .

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, 379000849 + ... + 379000852.

Almost surely, 2^1516003402 is an apocalyptic number.

1516003402 is a deficient number, since it is larger than the sum of its proper divisors (758001704).

1516003402 is an equidigital number, since it uses as much as digits as its factorization.

1516003402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758001703.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1516003402 is about 38935.8883550896. Note that the first 3 decimals coincide. The cubic root of 1516003402 is about 1148.7708106439.

Adding to 1516003402 its reverse (2043006151), we get a palindrome (3559009553).

The spelling of 1516003402 in words is "one billion, five hundred sixteen million, three thousand, four hundred two".