15220423402 has 8 divisors (see below), whose sum is σ = 23217595200. Its totient is φ = 7481225004.

The previous prime is 15220423367. The next prime is 15220423409. The reversal of 15220423402 is 20432402251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×15220423402² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15220423409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64493202 + ... + 64493437.

It is an arithmetic number, because the mean of its divisors is an integer number (2902199400).

Almost surely, 2^15220423402 is an apocalyptic number.

15220423402 is a deficient number, since it is larger than the sum of its proper divisors (7997171798).

15220423402 is a wasteful number, since it uses less digits than its factorization.

15220423402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128986700.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 15220423402 its reverse (20432402251), we get a palindrome (35652825653).

The spelling of 15220423402 in words is "fifteen billion, two hundred twenty million, four hundred twenty-three thousand, four hundred two".