31402442101 has 4 divisors (see below), whose sum is σ = 31404279052. Its totient is φ = 31400605152.

The previous prime is 31402442089. The next prime is 31402442111. The reversal of 31402442101 is 10124420413.

It is a happy number.

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 4712685201 + 26689756900 = 68649^2 + 163370^2 .

It is a cyclic number.

It is not a de Polignac number, because 31402442101 - 2⁹ = 31402441589 is a prime.

It is a super-2 number, since 2×31402442101² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402442111) 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, 892590 + ... + 927103.

It is an arithmetic number, because the mean of its divisors is an integer number (7851069763).

Almost surely, 2^31402442101 is an apocalyptic number.

It is an amenable number.

31402442101 is a deficient number, since it is larger than the sum of its proper divisors (1836951).

31402442101 is a wasteful number, since it uses less digits than its factorization.

31402442101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836950.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31402442101 its reverse (10124420413), we get a palindrome (41526862514).

The spelling of 31402442101 in words is "thirty-one billion, four hundred two million, four hundred forty-two thousand, one hundred one".