1531357023 has 32 divisors (see below), whose sum is σ = 2372339200. Its totient is φ = 860616576.

The previous prime is 1531357021. The next prime is 1531357031. The reversal of 1531357023 is 3207531351.

It is not a de Polignac number, because 1531357023 - 2¹ = 1531357021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531357021) 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 31 ways as a sum of consecutive naturals, for example, 315765 + ... + 320577.

It is an arithmetic number, because the mean of its divisors is an integer number (74135600).

Almost surely, 2^1531357023 is an apocalyptic number.

1531357023 is a deficient number, since it is larger than the sum of its proper divisors (840982177).

1531357023 is a wasteful number, since it uses less digits than its factorization.

1531357023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071.

The product of its (nonzero) digits is 9450, while the sum is 30.

The square root of 1531357023 is about 39132.5570720851. The cubic root of 1531357023 is about 1152.6359253264.

Adding to 1531357023 its reverse (3207531351), we get a palindrome (4738888374).

The spelling of 1531357023 in words is "one billion, five hundred thirty-one million, three hundred fifty-seven thousand, twenty-three".