31001432401 has 4 divisors (see below), whose sum is σ = 31012712500. Its totient is φ = 30990152304.

The previous prime is 31001432393. The next prime is 31001432437. The reversal of 31001432401 is 10423410013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8055242001 + 22946190400 = 89751^2 + 151480^2 .

It is a cyclic number.

It is not a de Polignac number, because 31001432401 - 2³ = 31001432393 is a prime.

It is a super-2 number, since 2×31001432401² (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 (31001432471) 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, 5635926 + ... + 5641423.

It is an arithmetic number, because the mean of its divisors is an integer number (7753178125).

Almost surely, 2^31001432401 is an apocalyptic number.

It is an amenable number.

31001432401 is a deficient number, since it is larger than the sum of its proper divisors (11280099).

31001432401 is a wasteful number, since it uses less digits than its factorization.

31001432401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11280098.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31001432401 its reverse (10423410013), we get a palindrome (41424842414).

The spelling of 31001432401 in words is "thirty-one billion, one million, four hundred thirty-two thousand, four hundred one".