1331237051 has 2 divisors, whose sum is σ = 1331237052. Its totient is φ = 1331237050.

The previous prime is 1331236997. The next prime is 1331237053. The reversal of 1331237051 is 1507321331.

It is a strong prime.

It is an emirp because it is prime and its reverse (1507321331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331237051 is a prime.

Together with 1331237053, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331237051.

It is not a weakly prime, because it can be changed into another prime (1331237053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665618525 + 665618526.

It is an arithmetic number, because the mean of its divisors is an integer number (665618526).

Almost surely, 2^1331237051 is an apocalyptic number.

1331237051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331237051 is an equidigital number, since it uses as much as digits as its factorization.

1331237051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 1331237051 is about 36486.1213477125. The cubic root of 1331237051 is about 1100.0652994293.

Adding to 1331237051 its reverse (1507321331), we get a palindrome (2838558382).

The spelling of 1331237051 in words is "one billion, three hundred thirty-one million, two hundred thirty-seven thousand, fifty-one".