203451332651 has 16 divisors (see below), whose sum is σ = 234314282496. Its totient is φ = 173041629696.

The previous prime is 203451332621. The next prime is 203451332659. The reversal of 203451332651 is 156233154302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 203451332651 - 2¹⁴ = 203451316267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203451332659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523700 + ... + 825326.

It is an arithmetic number, because the mean of its divisors is an integer number (14644642656).

Almost surely, 2^203451332651 is an apocalyptic number.

203451332651 is a deficient number, since it is larger than the sum of its proper divisors (30862949845).

203451332651 is a wasteful number, since it uses less digits than its factorization.

203451332651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302378.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 203451332651 its reverse (156233154302), we get a palindrome (359684486953).

The spelling of 203451332651 in words is "two hundred three billion, four hundred fifty-one million, three hundred thirty-two thousand, six hundred fifty-one".