1615340401 has 2 divisors, whose sum is σ = 1615340402. Its totient is φ = 1615340400.

The previous prime is 1615340381. The next prime is 1615340431. The reversal of 1615340401 is 1040435161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1184736400 + 430604001 = 34420^2 + 20751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1615340401 - 2¹⁹ = 1614816113 is a prime.

It is a super-2 number, since 2×1615340401² = 5218649222205681602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1615340431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807670200 + 807670201.

It is an arithmetic number, because the mean of its divisors is an integer number (807670201).

Almost surely, 2^1615340401 is an apocalyptic number.

It is an amenable number.

1615340401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615340401 is an equidigital number, since it uses as much as digits as its factorization.

1615340401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1615340401 is about 40191.2975779583. The cubic root of 1615340401 is about 1173.3331793342. Note that the first 3 decimals are identical.

Adding to 1615340401 its reverse (1040435161), we get a palindrome (2655775562).

The spelling of 1615340401 in words is "one billion, six hundred fifteen million, three hundred forty thousand, four hundred one".