15251063478121 has 9 divisors (see below), whose sum is σ = 15266892286461. Its totient is φ = 15235251076332.

The previous prime is 15251063478107. The next prime is 15251063478137. The reversal of 15251063478121 is 12187436015251.

It is a happy number.

The square root of 15251063478121 is 3905261.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 15251063478121 - 2¹⁷ = 15251063347049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15251063478221) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6182026930 + ... + 6182029396.

Almost surely, 2^{15251063478121} is an apocalyptic number.

15251063478121 is the 3905261-st square number.

15251063478121 is the 1952631-st centered octagonal number.

It is an amenable number.

15251063478121 is a deficient number, since it is larger than the sum of its proper divisors (15828808340).

15251063478121 is an frugal number, since it uses more digits than its factorization.

15251063478121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8100 (or 4050 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 15251063478121 in words is "fifteen trillion, two hundred fifty-one billion, sixty-three million, four hundred seventy-eight thousand, one hundred twenty-one".