15431442 has 32 divisors (see below), whose sum is σ = 34141632. Its totient is φ = 4618944.

The previous prime is 15431387. The next prime is 15431447. The reversal of 15431442 is 24413451.

It is not an unprimeable number, because it can be changed into a prime (15431447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213 + ... + 5559.

It is an arithmetic number, because the mean of its divisors is an integer number (1066926).

Almost surely, 2^15431442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15431442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17070816).

15431442 is an abundant number, since it is smaller than the sum of its proper divisors (18710190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15431442 is a wasteful number, since it uses less digits than its factorization.

15431442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5402.

The product of its digits is 1920, while the sum is 24.

The square root of 15431442 is about 3928.2874131102. The cubic root of 15431442 is about 248.9633984361.

Adding to 15431442 its reverse (24413451), we get a palindrome (39844893).

Subtracting 15431442 from its reverse (24413451), we obtain a square (8982009 = 2997²).

The spelling of 15431442 in words is "fifteen million, four hundred thirty-one thousand, four hundred forty-two".