31404211001031 has 32 divisors (see below), whose sum is σ = 46305442040832. Its totient is φ = 18771785717760.

The previous prime is 31404211001029. The next prime is 31404211001099. The reversal of 31404211001031 is 13010011240413.

It is not a de Polignac number, because 31404211001031 - 2¹ = 31404211001029 is a prime.

It is a super-2 number, since 2×31404211001031² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31404211000989 and 31404211001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31404211001131) 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, 200429986 + ... + 200586608.

It is an arithmetic number, because the mean of its divisors is an integer number (1447045063776).

Almost surely, 2^{31404211001031} is an apocalyptic number.

31404211001031 is a deficient number, since it is larger than the sum of its proper divisors (14901231039801).

31404211001031 is a wasteful number, since it uses less digits than its factorization.

31404211001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239943.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31404211001031 its reverse (13010011240413), we get a palindrome (44414222241444).

The spelling of 31404211001031 in words is "thirty-one trillion, four hundred four billion, two hundred eleven million, one thousand, thirty-one".