1540221037 has 2 divisors, whose sum is σ = 1540221038. Its totient is φ = 1540221036.

The previous prime is 1540221031. The next prime is 1540221043. The reversal of 1540221037 is 7301220451.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1540221031) and next prime (1540221043).

It can be written as a sum of positive squares in only one way, i.e., 1369814121 + 170406916 = 37011^2 + 13054^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540221037 - 2¹⁵ = 1540188269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540221031) 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 as a sum of consecutive naturals, namely, 770110518 + 770110519.

It is an arithmetic number, because the mean of its divisors is an integer number (770110519).

Almost surely, 2^1540221037 is an apocalyptic number.

It is an amenable number.

1540221037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540221037 is an equidigital number, since it uses as much as digits as its factorization.

1540221037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1540221037 is about 39245.6499118055. The cubic root of 1540221037 is about 1154.8555973465.

Adding to 1540221037 its reverse (7301220451), we get a palindrome (8841441488).

The spelling of 1540221037 in words is "one billion, five hundred forty million, two hundred twenty-one thousand, thirty-seven".