31402061 has 4 divisors (see below), whose sum is σ = 32767392. Its totient is φ = 30036732.

The previous prime is 31402037. The next prime is 31402069. The reversal of 31402061 is 16020413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31402061 - 2¹⁰ = 31401037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402069) 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, 682631 + ... + 682676.

It is an arithmetic number, because the mean of its divisors is an integer number (8191848).

Almost surely, 2^31402061 is an apocalyptic number.

It is an amenable number.

31402061 is a deficient number, since it is larger than the sum of its proper divisors (1365331).

31402061 is a wasteful number, since it uses less digits than its factorization.

31402061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365330.

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

The square root of 31402061 is about 5603.7541880422. The cubic root of 31402061 is about 315.4903289925.

Adding to 31402061 its reverse (16020413), we get a palindrome (47422474).

The spelling of 31402061 in words is "thirty-one million, four hundred two thousand, sixty-one".