15422402 has 4 divisors (see below), whose sum is σ = 23133606. Its totient is φ = 7711200.

The previous prime is 15422389. The next prime is 15422411. The reversal of 15422402 is 20422451.

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: 20422451 = 7 ⋅2917493.

It can be written as a sum of positive squares in only one way, i.e., 11215801 + 4206601 = 3349^2 + 2051^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3855599 + ... + 3855602.

Almost surely, 2^15422402 is an apocalyptic number.

15422402 is a deficient number, since it is larger than the sum of its proper divisors (7711204).

15422402 is an equidigital number, since it uses as much as digits as its factorization.

15422402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7711203.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 15422402 is about 3927.1366159073. The cubic root of 15422402 is about 248.9147732817.

Adding to 15422402 its reverse (20422451), we get a palindrome (35844853).

The spelling of 15422402 in words is "fifteen million, four hundred twenty-two thousand, four hundred two".