31401242005 has 16 divisors (see below), whose sum is σ = 43085295360. Its totient is φ = 21521912832.

The previous prime is 31401242003. The next prime is 31401242017. The reversal of 31401242005 is 50024210413.

It is not a de Polignac number, because 31401242005 - 2¹ = 31401242003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401242003) 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, 141900 + ... + 287989.

It is an arithmetic number, because the mean of its divisors is an integer number (2692830960).

Almost surely, 2^31401242005 is an apocalyptic number.

31401242005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31401242005 is a deficient number, since it is larger than the sum of its proper divisors (11684053355).

31401242005 is a wasteful number, since it uses less digits than its factorization.

31401242005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431988.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 31401242005 its reverse (50024210413), we get a palindrome (81425452418).

The spelling of 31401242005 in words is "thirty-one billion, four hundred one million, two hundred forty-two thousand, five".