1551340242 has 16 divisors (see below), whose sum is σ = 3447422880. Its totient is φ = 517113396.

The previous prime is 1551340237. The next prime is 1551340243. The reversal of 1551340242 is 2420431551.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1551340243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14364208 + ... + 14364315.

It is an arithmetic number, because the mean of its divisors is an integer number (215463930).

Almost surely, 2^1551340242 is an apocalyptic number.

1551340242 is an abundant number, since it is smaller than the sum of its proper divisors (1896082638).

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

1551340242 is a wasteful number, since it uses less digits than its factorization.

1551340242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28728534 (or 28728528 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1551340242 is about 39387.0567826539. The cubic root of 1551340242 is about 1157.6279913264.

Adding to 1551340242 its reverse (2420431551), we get a palindrome (3971771793).

It can be divided in two parts, 15513 and 40242, that added together give a palindrome (55755).

The spelling of 1551340242 in words is "one billion, five hundred fifty-one million, three hundred forty thousand, two hundred forty-two".