501531480 has 64 divisors (see below), whose sum is σ = 1671775200. Its totient is φ = 133741440.

The previous prime is 501531473. The next prime is 501531487. The reversal of 501531480 is 84135105.

501531480 is a `hidden beast` number, since 50 + 1 + 531 + 4 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (501531473) and next prime (501531487).

It is a super-3 number, since 3×501531480³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501531487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231111 + ... + 233270.

Almost surely, 2^501531480 is an apocalyptic number.

It is an amenable number.

501531480 is an abundant number, since it is smaller than the sum of its proper divisors (1170243720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

501531480 is a wasteful number, since it uses less digits than its factorization.

501531480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464401 (or 464391 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 501531480 is about 22394.8985262269. The cubic root of 501531480 is about 794.5100576791.

Adding to 501531480 its reverse (84135105), we get a palindrome (585666585).

The spelling of 501531480 in words is "five hundred one million, five hundred thirty-one thousand, four hundred eighty".