63503431 has 2 divisors, whose sum is σ = 63503432. Its totient is φ = 63503430.

The previous prime is 63503423. The next prime is 63503441. The reversal of 63503431 is 13430536.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63503431 - 2³ = 63503423 is a prime.

It is a super-2 number, since 2×63503431² = 8065371497543522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63503396 and 63503405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63503441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31751715 + 31751716.

It is an arithmetic number, because the mean of its divisors is an integer number (31751716).

Almost surely, 2^63503431 is an apocalyptic number.

63503431 is a deficient number, since it is larger than the sum of its proper divisors (1).

63503431 is an equidigital number, since it uses as much as digits as its factorization.

63503431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 63503431 is about 7968.9040024335. The cubic root of 63503431 is about 398.9627940844.

Adding to 63503431 its reverse (13430536), we get a palindrome (76933967).

The spelling of 63503431 in words is "sixty-three million, five hundred three thousand, four hundred thirty-one".