1337225581 has 2 divisors, whose sum is σ = 1337225582. Its totient is φ = 1337225580.

The previous prime is 1337225551. The next prime is 1337225587. The reversal of 1337225581 is 1855227331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988096356 + 349129225 = 31434^2 + 18685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1337225581 - 2²³ = 1328836973 is a prime.

It is a super-2 number, since 2×1337225581² = 3576344508961575122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1337225581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1337225587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668612790 + 668612791.

It is an arithmetic number, because the mean of its divisors is an integer number (668612791).

Almost surely, 2^1337225581 is an apocalyptic number.

It is an amenable number.

1337225581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1337225581 is an equidigital number, since it uses as much as digits as its factorization.

1337225581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 1337225581 is about 36568.0951240285. The cubic root of 1337225581 is about 1101.7123690615.

The spelling of 1337225581 in words is "one billion, three hundred thirty-seven million, two hundred twenty-five thousand, five hundred eighty-one".