1331940501 has 6 divisors (see below), whose sum is σ = 1923914070. Its totient is φ = 887960328.

The previous prime is 1331940481. The next prime is 1331940529. The reversal of 1331940501 is 1050491331.

It can be written as a sum of positive squares in only one way, i.e., 912100401 + 419840100 = 30201^2 + 20490^2 .

It is not a de Polignac number, because 1331940501 - 2⁹ = 1331939989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331940581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73996686 + ... + 73996703.

It is an arithmetic number, because the mean of its divisors is an integer number (320652345).

Almost surely, 2^1331940501 is an apocalyptic number.

It is an amenable number.

1331940501 is a deficient number, since it is larger than the sum of its proper divisors (591973569).

1331940501 is a wasteful number, since it uses less digits than its factorization.

1331940501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147993395 (or 147993392 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 1331940501 is about 36495.7600414075. The cubic root of 1331940501 is about 1100.2590301828.

The spelling of 1331940501 in words is "one billion, three hundred thirty-one million, nine hundred forty thousand, five hundred one".