140021420531 has 12 divisors (see below), whose sum is σ = 148017814200. Its totient is φ = 132437360448.

The previous prime is 140021420509. The next prime is 140021420543. The reversal of 140021420531 is 135024120041.

It is not a de Polignac number, because 140021420531 - 2¹⁰ = 140021419507 is a prime.

It is a super-2 number, since 2×140021420531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140021420497 and 140021420506.

It is not an unprimeable number, because it can be changed into a prime (140021420551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89846 + ... + 536763.

It is an arithmetic number, because the mean of its divisors is an integer number (12334817850).

Almost surely, 2^140021420531 is an apocalyptic number.

140021420531 is a deficient number, since it is larger than the sum of its proper divisors (7996393669).

140021420531 is an equidigital number, since it uses as much as digits as its factorization.

140021420531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627266 (or 627247 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 140021420531 its reverse (135024120041), we get a palindrome (275045540572).

The spelling of 140021420531 in words is "one hundred forty billion, twenty-one million, four hundred twenty thousand, five hundred thirty-one".