31321145401 has 24 divisors (see below), whose sum is σ = 39328861824. Its totient is φ = 24723851040.

The previous prime is 31321145393. The next prime is 31321145411. The reversal of 31321145401 is 10454112313.

It is not a de Polignac number, because 31321145401 - 2³ = 31321145393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31321145411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217506 + ... + 331588.

It is an arithmetic number, because the mean of its divisors is an integer number (1638702576).

Almost surely, 2^31321145401 is an apocalyptic number.

It is an amenable number.

31321145401 is a deficient number, since it is larger than the sum of its proper divisors (8007716423).

31321145401 is a wasteful number, since it uses less digits than its factorization.

31321145401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114541 (or 114534 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 31321145401 its reverse (10454112313), we get a palindrome (41775257714).

The spelling of 31321145401 in words is "thirty-one billion, three hundred twenty-one million, one hundred forty-five thousand, four hundred one".