501131232 has 384 divisors, whose sum is σ = 1814400000. Its totient is φ = 134120448.

The previous prime is 501131227. The next prime is 501131243. The reversal of 501131232 is 232131105.

501131232 is a `hidden beast` number, since 501 + 131 + 2 + 32 = 666.

It is a super-2 number, since 2×501131232² = 502265023371675648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5630644 + ... + 5630732.

It is an arithmetic number, because the mean of its divisors is an integer number (4725000).

Almost surely, 2^501131232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907200000).

501131232 is an abundant number, since it is smaller than the sum of its proper divisors (1313268768).

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

501131232 is a wasteful number, since it uses less digits than its factorization.

501131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 501131232 is about 22385.9606003406. The cubic root of 501131232 is about 794.2986480897.

Adding to 501131232 its reverse (232131105), we get a palindrome (733262337).

The spelling of 501131232 in words is "five hundred one million, one hundred thirty-one thousand, two hundred thirty-two".