31402106 has 4 divisors (see below), whose sum is σ = 47103162. Its totient is φ = 15701052.

The previous prime is 31402103. The next prime is 31402121. The reversal of 31402106 is 60120413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60120413 = 23 ⋅2613931.

It can be written as a sum of positive squares in only one way, i.e., 23921881 + 7480225 = 4891^2 + 2735^2 .

It is a super-2 number, since 2×31402106² = 1972184522470472, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31402103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7850525 + ... + 7850528.

Almost surely, 2^31402106 is an apocalyptic number.

31402106 is a deficient number, since it is larger than the sum of its proper divisors (15701056).

31402106 is a wasteful number, since it uses less digits than its factorization.

31402106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15701055.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31402106 is about 5603.7582032061. The cubic root of 31402106 is about 315.4904796944.

Adding to 31402106 its reverse (60120413), we get a palindrome (91522519).

The spelling of 31402106 in words is "thirty-one million, four hundred two thousand, one hundred six".