531157478 has 8 divisors (see below), whose sum is σ = 796866168. Its totient is φ = 265535424.

The previous prime is 531157477. The next prime is 531157499. The reversal of 531157478 is 874751135.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531157477) 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, 3176 + ... + 32747.

It is an arithmetic number, because the mean of its divisors is an integer number (99608271).

Almost surely, 2^531157478 is an apocalyptic number.

531157478 is a deficient number, since it is larger than the sum of its proper divisors (265708690).

531157478 is a wasteful number, since it uses less digits than its factorization.

531157478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43318.

The product of its digits is 117600, while the sum is 41.

The square root of 531157478 is about 23046.8539718548. The cubic root of 531157478 is about 809.8559302778.

The spelling of 531157478 in words is "five hundred thirty-one million, one hundred fifty-seven thousand, four hundred seventy-eight".