1338231651 has 16 divisors (see below), whose sum is σ = 1895728800. Its totient is φ = 838107648.

The previous prime is 1338231649. The next prime is 1338231689. The reversal of 1338231651 is 1561328331.

It is not a de Polignac number, because 1338231651 - 2¹ = 1338231649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1338231151) 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, 204646 + ... + 211083.

It is an arithmetic number, because the mean of its divisors is an integer number (118483050).

Almost surely, 2^1338231651 is an apocalyptic number.

1338231651 is a deficient number, since it is larger than the sum of its proper divisors (557497149).

1338231651 is a wasteful number, since it uses less digits than its factorization.

1338231651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415798.

The product of its digits is 12960, while the sum is 33.

The square root of 1338231651 is about 36581.8486547632. The cubic root of 1338231651 is about 1101.9885931892.

Adding to 1338231651 its reverse (1561328331), we get a palindrome (2899559982).

The spelling of 1338231651 in words is "one billion, three hundred thirty-eight million, two hundred thirty-one thousand, six hundred fifty-one".