31243432401 has 32 divisors (see below), whose sum is σ = 48818832000. Its totient is φ = 19693761984.

The previous prime is 31243432397. The next prime is 31243432403. The reversal of 31243432401 is 10423434213.

31243432401 is a `hidden beast` number, since 312 + 4 + 343 + 2 + 4 + 0 + 1 = 666.

It is not a de Polignac number, because 31243432401 - 2² = 31243432397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31243432403) 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, 201291 + ... + 320943.

It is an arithmetic number, because the mean of its divisors is an integer number (1525588500).

Almost surely, 2^31243432401 is an apocalyptic number.

It is an amenable number.

31243432401 is a deficient number, since it is larger than the sum of its proper divisors (17575399599).

31243432401 is a wasteful number, since it uses less digits than its factorization.

31243432401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120190 (or 120184 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 31243432401 its reverse (10423434213), we get a palindrome (41666866614).

The spelling of 31243432401 in words is "thirty-one billion, two hundred forty-three million, four hundred thirty-two thousand, four hundred one".