1538122047 has 32 divisors (see below), whose sum is σ = 2611298304. Its totient is φ = 782018400.

The previous prime is 1538122013. The next prime is 1538122049. The reversal of 1538122047 is 7402218351.

It is not a de Polignac number, because 1538122047 - 2¹⁴ = 1538105663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 1538121999 and 1538122017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538122049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59979 + ... + 81692.

It is an arithmetic number, because the mean of its divisors is an integer number (81603072).

Almost surely, 2^1538122047 is an apocalyptic number.

1538122047 is a deficient number, since it is larger than the sum of its proper divisors (1073176257).

1538122047 is a wasteful number, since it uses less digits than its factorization.

1538122047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141739.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 1538122047 is about 39218.8991048958. The cubic root of 1538122047 is about 1154.3307522603.

The spelling of 1538122047 in words is "one billion, five hundred thirty-eight million, one hundred twenty-two thousand, forty-seven".