2002215431 has 4 divisors (see below), whose sum is σ = 2002355712. Its totient is φ = 2002075152.

The previous prime is 2002215427. The next prime is 2002215451. The reversal of 2002215431 is 1345122002.

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

It is a cyclic number.

It is not a de Polignac number, because 2002215431 - 2² = 2002215427 is a prime.

It is a super-2 number, since 2×2002215431² = 8017733264269031522, which 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 (2002215401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45950 + ... + 78203.

It is an arithmetic number, because the mean of its divisors is an integer number (500588928).

Almost surely, 2^2002215431 is an apocalyptic number.

2002215431 is a deficient number, since it is larger than the sum of its proper divisors (140281).

2002215431 is a wasteful number, since it uses less digits than its factorization.

2002215431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140280.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2002215431 is about 44746.1219660430. The cubic root of 2002215431 is about 1260.3860895851.

Adding to 2002215431 its reverse (1345122002), we get a palindrome (3347337433).

It can be divided in two parts, 20022 and 15431, that added together give a palindrome (35453).

The spelling of 2002215431 in words is "two billion, two million, two hundred fifteen thousand, four hundred thirty-one".