15642230 has 16 divisors (see below), whose sum is σ = 28618704. Its totient is φ = 6154080.

The previous prime is 15642217. The next prime is 15642247. The reversal of 15642230 is 3224651.

It is a junction number, because it is equal to n+sod(n) for n = 15642196 and 15642205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12212 + ... + 13431.

It is an arithmetic number, because the mean of its divisors is an integer number (1788669).

Almost surely, 2^15642230 is an apocalyptic number.

15642230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15642230 is a deficient number, since it is larger than the sum of its proper divisors (12976474).

15642230 is a wasteful number, since it uses less digits than its factorization.

15642230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25711.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 15642230 is about 3955.0259164764. The cubic root of 15642230 is about 250.0918595765.

Adding to 15642230 its reverse (3224651), we get a palindrome (18866881).

The spelling of 15642230 in words is "fifteen million, six hundred forty-two thousand, two hundred thirty".