15415220461 has 2 divisors, whose sum is σ = 15415220462. Its totient is φ = 15415220460.

The previous prime is 15415220449. The next prime is 15415220473. The reversal of 15415220461 is 16402251451.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (15415220449) and next prime (15415220473).

It can be written as a sum of positive squares in only one way, i.e., 8688104100 + 6727116361 = 93210^2 + 82019^2 .

It is a cyclic number.

It is not a de Polignac number, because 15415220461 - 2⁹ = 15415219949 is a prime.

It is a super-2 number, since 2×15415220461² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15415220861) 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, 7707610230 + 7707610231.

It is an arithmetic number, because the mean of its divisors is an integer number (7707610231).

Almost surely, 2^15415220461 is an apocalyptic number.

It is an amenable number.

15415220461 is a deficient number, since it is larger than the sum of its proper divisors (1).

15415220461 is an equidigital number, since it uses as much as digits as its factorization.

15415220461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 15415220461 in words is "fifteen billion, four hundred fifteen million, two hundred twenty thousand, four hundred sixty-one".