1531172342 has 16 divisors (see below), whose sum is σ = 2763018240. Its totient is φ = 621678888.

The previous prime is 1531172341. The next prime is 1531172359. The reversal of 1531172342 is 2432711351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531172341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2877878 + ... + 2878409.

It is an arithmetic number, because the mean of its divisors is an integer number (172688640).

Almost surely, 2^1531172342 is an apocalyptic number.

1531172342 is a deficient number, since it is larger than the sum of its proper divisors (1231845898).

1531172342 is a wasteful number, since it uses less digits than its factorization.

1531172342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5756315.

The product of its digits is 5040, while the sum is 29.

The square root of 1531172342 is about 39130.1973161394. The cubic root of 1531172342 is about 1152.5895876642.

Adding to 1531172342 its reverse (2432711351), we get a palindrome (3963883693).

The spelling of 1531172342 in words is "one billion, five hundred thirty-one million, one hundred seventy-two thousand, three hundred forty-two".