501431155140 has 48 divisors (see below), whose sum is σ = 1410192326592. Its totient is φ = 133125918336.

The previous prime is 501431155139. The next prime is 501431155193. The reversal of 501431155140 is 41551134105.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 501431155098 and 501431155107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18394279 + ... + 18421518.

It is an arithmetic number, because the mean of its divisors is an integer number (29379006804).

Almost surely, 2^501431155140 is an apocalyptic number.

It is an amenable number.

501431155140 is an abundant number, since it is smaller than the sum of its proper divisors (908761171452).

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

501431155140 is a wasteful number, since it uses less digits than its factorization.

501431155140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36816036 (or 36816034 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 501431155140 its reverse (41551134105), we get a palindrome (542982289245).

The spelling of 501431155140 in words is "five hundred one billion, four hundred thirty-one million, one hundred fifty-five thousand, one hundred forty".