31400232403 has 4 divisors (see below), whose sum is σ = 31482217728. Its totient is φ = 31318247080.

The previous prime is 31400232389. The next prime is 31400232421. The reversal of 31400232403 is 30423200413.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31400232403 - 2¹³ = 31400224211 is a prime.

It is a super-2 number, since 2×31400232403² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31400232433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40992088 + ... + 40992853.

It is an arithmetic number, because the mean of its divisors is an integer number (7870554432).

Almost surely, 2^31400232403 is an apocalyptic number.

31400232403 is a deficient number, since it is larger than the sum of its proper divisors (81985325).

31400232403 is an equidigital number, since it uses as much as digits as its factorization.

31400232403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81985324.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 31400232403 its reverse (30423200413), we get a palindrome (61823432816).

The spelling of 31400232403 in words is "thirty-one billion, four hundred million, two hundred thirty-two thousand, four hundred three".