1631253403 has 24 divisors (see below), whose sum is σ = 1850542848. Its totient is φ = 1434562272.

The previous prime is 1631253389. The next prime is 1631253419. The reversal of 1631253403 is 3043521361.

It is not a de Polignac number, because 1631253403 - 2¹³ = 1631245211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631253473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1192626 + ... + 1193992.

It is an arithmetic number, because the mean of its divisors is an integer number (77105952).

Almost surely, 2^1631253403 is an apocalyptic number.

1631253403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1631253403 is a deficient number, since it is larger than the sum of its proper divisors (219289445).

1631253403 is a wasteful number, since it uses less digits than its factorization.

1631253403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723 (or 1710 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1631253403 is about 40388.7781815692. The cubic root of 1631253403 is about 1177.1734999902.

Adding to 1631253403 its reverse (3043521361), we get a palindrome (4674774764).

The spelling of 1631253403 in words is "one billion, six hundred thirty-one million, two hundred fifty-three thousand, four hundred three".