1493257531 has 8 divisors (see below), whose sum is σ = 1545292800. Its totient is φ = 1441258560.

The previous prime is 1493257523. The next prime is 1493257537. The reversal of 1493257531 is 1357523941.

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

It is a cyclic number.

It is not a de Polignac number, because 1493257531 - 2³ = 1493257523 is a prime.

It is a super-2 number, since 2×1493257531² = 4459636107776431922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1493257537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95046 + ... + 109636.

It is an arithmetic number, because the mean of its divisors is an integer number (193161600).

Almost surely, 2^1493257531 is an apocalyptic number.

1493257531 is a deficient number, since it is larger than the sum of its proper divisors (52035269).

1493257531 is a wasteful number, since it uses less digits than its factorization.

1493257531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18149.

The product of its digits is 113400, while the sum is 40.

The square root of 1493257531 is about 38642.6905248586. The cubic root of 1493257531 is about 1142.9965106326.

The spelling of 1493257531 in words is "one billion, four hundred ninety-three million, two hundred fifty-seven thousand, five hundred thirty-one".