31420040430 has 64 divisors (see below), whose sum is σ = 79287336000. Its totient is φ = 7957125120.

The previous prime is 31420040429. The next prime is 31420040437. The reversal of 31420040430 is 3404002413.

It is a junction number, because it is equal to n+sod(n) for n = 31420040397 and 31420040406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420040437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242955 + ... + 349094.

It is an arithmetic number, because the mean of its divisors is an integer number (1238864625).

Almost surely, 2^31420040430 is an apocalyptic number.

31420040430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31420040430 is an abundant number, since it is smaller than the sum of its proper divisors (47867295570).

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

31420040430 is a wasteful number, since it uses less digits than its factorization.

31420040430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592149.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 31420040430 its reverse (3404002413), we get a palindrome (34824042843).

The spelling of 31420040430 in words is "thirty-one billion, four hundred twenty million, forty thousand, four hundred thirty".