31420002 has 16 divisors (see below), whose sum is σ = 63870912. Its totient is φ = 10301520.

The previous prime is 31419979. The next prime is 31420009. The reversal of 31420002 is 20002413.

It is a self number, because there is not a number n which added to its sum of digits gives 31420002.

It is not an unprimeable number, because it can be changed into a prime (31420009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42558 + ... + 43289.

It is an arithmetic number, because the mean of its divisors is an integer number (3991932).

Almost surely, 2^31420002 is an apocalyptic number.

31420002 is an abundant number, since it is smaller than the sum of its proper divisors (32450910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31420002 is a wasteful number, since it uses less digits than its factorization.

31420002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85913.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 31420002 is about 5605.3547612975. The cubic root of 31420002 is about 315.5504007861.

Adding to 31420002 its reverse (20002413), we get a palindrome (51422415).

The spelling of 31420002 in words is "thirty-one million, four hundred twenty thousand, two".