1532138047 has 4 divisors (see below), whose sum is σ = 1671423336. Its totient is φ = 1392852760.

The previous prime is 1532138009. The next prime is 1532138051. The reversal of 1532138047 is 7408312351.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1532138047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1532138057) 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 3 ways as a sum of consecutive naturals, for example, 69642628 + ... + 69642649.

It is an arithmetic number, because the mean of its divisors is an integer number (417855834).

Almost surely, 2^1532138047 is an apocalyptic number.

1532138047 is a deficient number, since it is larger than the sum of its proper divisors (139285289).

1532138047 is a wasteful number, since it uses less digits than its factorization.

1532138047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139285288.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1532138047 is about 39142.5350098841. The cubic root of 1532138047 is about 1152.8318481374.

The spelling of 1532138047 in words is "one billion, five hundred thirty-two million, one hundred thirty-eight thousand, forty-seven".