31430132140 has 96 divisors (see below), whose sum is σ = 74553696000. Its totient is φ = 11025073920.

The previous prime is 31430132093. The next prime is 31430132141. The reversal of 31430132140 is 4123103413.

It is a super-3 number, since 3×31430132140³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (31430132141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13390447 + ... + 13392793.

It is an arithmetic number, because the mean of its divisors is an integer number (776601000).

Almost surely, 2^31430132140 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 31430132140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37276848000).

31430132140 is an abundant number, since it is smaller than the sum of its proper divisors (43123563860).

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

31430132140 is a wasteful number, since it uses less digits than its factorization.

31430132140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4495 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31430132140 its reverse (4123103413), we get a palindrome (35553235553).

The spelling of 31430132140 in words is "thirty-one billion, four hundred thirty million, one hundred thirty-two thousand, one hundred forty".