1531078138 has 8 divisors (see below), whose sum is σ = 2296798560. Its totient is φ = 765478620.

The previous prime is 1531078117. The next prime is 1531078139. The reversal of 1531078138 is 8318701351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1531078097 and 1531078106.

It is not an unprimeable number, because it can be changed into a prime (1531078139) 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, 14923 + ... + 57313.

It is an arithmetic number, because the mean of its divisors is an integer number (287099820).

Almost surely, 2^1531078138 is an apocalyptic number.

1531078138 is a deficient number, since it is larger than the sum of its proper divisors (765720422).

1531078138 is a wasteful number, since it uses less digits than its factorization.

1531078138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60452.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1531078138 is about 39128.9935725416. The cubic root of 1531078138 is about 1152.5659498338.

Adding to 1531078138 its reverse (8318701351), we get a palindrome (9849779489).

The spelling of 1531078138 in words is "one billion, five hundred thirty-one million, seventy-eight thousand, one hundred thirty-eight".