1331532135 has 64 divisors (see below), whose sum is σ = 2451456000. Its totient is φ = 685190016.

The previous prime is 1331532131. The next prime is 1331532143. The reversal of 1331532135 is 5312351331.

1331532135 is a `hidden beast` number, since 1 + 331 + 5 + 321 + 3 + 5 = 666.

It is not a de Polignac number, because 1331532135 - 2² = 1331532131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1331532099 and 1331532108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331532131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 633316 + ... + 635414.

It is an arithmetic number, because the mean of its divisors is an integer number (38304000).

Almost surely, 2^1331532135 is an apocalyptic number.

1331532135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1331532135 is a deficient number, since it is larger than the sum of its proper divisors (1119923865).

1331532135 is a wasteful number, since it uses less digits than its factorization.

1331532135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277 (or 2271 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 1331532135 is about 36490.1649078214. The cubic root of 1331532135 is about 1100.1465741322.

Adding to 1331532135 its reverse (5312351331), we get a palindrome (6643883466).

The spelling of 1331532135 in words is "one billion, three hundred thirty-one million, five hundred thirty-two thousand, one hundred thirty-five".