31440020400201 has 16 divisors (see below), whose sum is σ = 47910163682304. Its totient is φ = 17965140505104.

The previous prime is 31440020400197. The next prime is 31440020400209. The reversal of 31440020400201 is 10200402004413.

It is not a de Polignac number, because 31440020400201 - 2² = 31440020400197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (31440020400209) 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, 23733045 + ... + 25022738.

It is an arithmetic number, because the mean of its divisors is an integer number (2994385230144).

Almost surely, 2^{31440020400201} is an apocalyptic number.

It is an amenable number.

31440020400201 is a deficient number, since it is larger than the sum of its proper divisors (16470143282103).

31440020400201 is a wasteful number, since it uses less digits than its factorization.

31440020400201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48786500.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 31440020400201 its reverse (10200402004413), we get a palindrome (41640422404614).

The spelling of 31440020400201 in words is "thirty-one trillion, four hundred forty billion, twenty million, four hundred thousand, two hundred one".