50420213531 has 16 divisors (see below), whose sum is σ = 57167984640. Its totient is φ = 44215839360.

The previous prime is 50420213527. The next prime is 50420213539. The reversal of 50420213531 is 13531202405.

It is a happy number.

It is not a de Polignac number, because 50420213531 - 2² = 50420213527 is a prime.

It is a super-2 number, since 2×50420213531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50420213531.

It is not an unprimeable number, because it can be changed into a prime (50420213539) 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, 1847390 + ... + 1874483.

It is an arithmetic number, because the mean of its divisors is an integer number (3572999040).

Almost surely, 2^50420213531 is an apocalyptic number.

50420213531 is a deficient number, since it is larger than the sum of its proper divisors (6747771109).

50420213531 is a wasteful number, since it uses less digits than its factorization.

50420213531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721946.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 50420213531 its reverse (13531202405), we get a palindrome (63951415936).

The spelling of 50420213531 in words is "fifty billion, four hundred twenty million, two hundred thirteen thousand, five hundred thirty-one".