15225220465 has 48 divisors (see below), whose sum is σ = 23506800912. Its totient is φ = 9376528896.

The previous prime is 15225220463. The next prime is 15225220511. The reversal of 15225220465 is 56402252251.

15225220465 = T₁₄₃₁₉ + T₁₄₃₂₀ + ... + T₁₄₄₆₅.

It can be written as a sum of positive squares in 8 ways, for example, as 191517921 + 15033702544 = 13839^2 + 122612^2 .

It is not a de Polignac number, because 15225220465 - 2¹ = 15225220463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15225220465.

It is not an unprimeable number, because it can be changed into a prime (15225220463) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53247 + ... + 182443.

It is an arithmetic number, because the mean of its divisors is an integer number (489725019).

Almost surely, 2^15225220465 is an apocalyptic number.

It is an amenable number.

15225220465 is a deficient number, since it is larger than the sum of its proper divisors (8281580447).

15225220465 is a wasteful number, since it uses less digits than its factorization.

15225220465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129266 (or 129259 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 15225220465 in words is "fifteen billion, two hundred twenty-five million, two hundred twenty thousand, four hundred sixty-five".