202145431 has 4 divisors (see below), whose sum is σ = 204108112. Its totient is φ = 200182752.

The previous prime is 202145429. The next prime is 202145479. The reversal of 202145431 is 134541202.

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 202145431 - 2¹ = 202145429 is a prime.

It is a super-2 number, since 2×202145431² = 81725550548351522, 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 (202145131) 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, 981186 + ... + 981391.

It is an arithmetic number, because the mean of its divisors is an integer number (51027028).

Almost surely, 2^202145431 is an apocalyptic number.

202145431 is a deficient number, since it is larger than the sum of its proper divisors (1962681).

202145431 is a wasteful number, since it uses less digits than its factorization.

202145431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962680.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 202145431 is about 14217.7857277426. The cubic root of 202145431 is about 586.8872074947.

Adding to 202145431 its reverse (134541202), we get a palindrome (336686633).

The spelling of 202145431 in words is "two hundred two million, one hundred forty-five thousand, four hundred thirty-one".