31421602 has 4 divisors (see below), whose sum is σ = 47132406. Its totient is φ = 15710800.

The previous prime is 31421597. The next prime is 31421617. The reversal of 31421602 is 20612413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 11964681 = 4411^2 + 3459^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31421602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7855399 + ... + 7855402.

Almost surely, 2^31421602 is an apocalyptic number.

31421602 is a deficient number, since it is larger than the sum of its proper divisors (15710804).

31421602 is a wasteful number, since it uses less digits than its factorization.

31421602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15710803.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 31421602 is about 5605.4974801529. The cubic root of 31421602 is about 315.5557569503. Note that the first 3 decimals are identical.

It can be divided in two parts, 31421 and 602, that added together give a palindrome (32023).

The spelling of 31421602 in words is "thirty-one million, four hundred twenty-one thousand, six hundred two".