1331541402 has 8 divisors (see below), whose sum is σ = 2663082816. Its totient is φ = 443847132.

The previous prime is 1331541401. The next prime is 1331541433. The reversal of 1331541402 is 2041451331.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1331541402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1331541401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110961778 + ... + 110961789.

It is an arithmetic number, because the mean of its divisors is an integer number (332885352).

Almost surely, 2^1331541402 is an apocalyptic number.

1331541402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331541402 is a wasteful number, since it uses less digits than its factorization.

1331541402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221923572.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1331541402 is about 36490.2918870211. The cubic root of 1331541402 is about 1100.1491263386.

Adding to 1331541402 its reverse (2041451331), we get a palindrome (3372992733).

The spelling of 1331541402 in words is "one billion, three hundred thirty-one million, five hundred forty-one thousand, four hundred two".