15225422402 has 4 divisors (see below), whose sum is σ = 22838133606. Its totient is φ = 7612711200.

The previous prime is 15225422393. The next prime is 15225422417. The reversal of 15225422402 is 20422452251.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20422452251 = 47713 ⋅428027.

It can be written as a sum of positive squares in only one way, i.e., 15225338881 + 83521 = 123391^2 + 289^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3806355599 + ... + 3806355602.

Almost surely, 2^15225422402 is an apocalyptic number.

15225422402 is a deficient number, since it is larger than the sum of its proper divisors (7612711204).

15225422402 is an equidigital number, since it uses as much as digits as its factorization.

15225422402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7612711203.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 15225422402 its reverse (20422452251), we get a palindrome (35647874653).

The spelling of 15225422402 in words is "fifteen billion, two hundred twenty-five million, four hundred twenty-two thousand, four hundred two".