1520138263 has 32 divisors (see below), whose sum is σ = 1890685440. Its totient is φ = 1193149440.

The previous prime is 1520138237. The next prime is 1520138273. The reversal of 1520138263 is 3628310251.

It is a de Polignac number, because none of the positive numbers 2^k-1520138263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520138273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 614956 + ... + 617422.

It is an arithmetic number, because the mean of its divisors is an integer number (59083920).

Almost surely, 2^1520138263 is an apocalyptic number.

1520138263 is a deficient number, since it is larger than the sum of its proper divisors (370547177).

1520138263 is a wasteful number, since it uses less digits than its factorization.

1520138263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1520138263 is about 38988.9505244755. The cubic root of 1520138263 is about 1149.8142770020.

The spelling of 1520138263 in words is "one billion, five hundred twenty million, one hundred thirty-eight thousand, two hundred sixty-three".