15225400001 has 12 divisors (see below), whose sum is σ = 17767068948. Its totient is φ = 13009161312.

The previous prime is 15225399983. The next prime is 15225400013. The reversal of 15225400001 is 10000452251.

It can be written as a sum of positive squares in 2 ways, for example, as 5631001600 + 9594398401 = 75040^2 + 97951^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15225400001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15225400081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 474566 + ... + 505631.

It is an arithmetic number, because the mean of its divisors is an integer number (1480589079).

Almost surely, 2^15225400001 is an apocalyptic number.

It is an amenable number.

15225400001 is a deficient number, since it is larger than the sum of its proper divisors (2541668947).

15225400001 is an equidigital number, since it uses as much as digits as its factorization.

15225400001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980528 (or 980521 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 15225400001 its reverse (10000452251), we get a palindrome (25225852252).

The spelling of 15225400001 in words is "fifteen billion, two hundred twenty-five million, four hundred thousand, one".