1551440342 has 16 divisors (see below), whose sum is σ = 2365241280. Its totient is φ = 763059528.

The previous prime is 1551440339. The next prime is 1551440351. The reversal of 1551440342 is 2430441551.

It is a congruent number.

It is an unprimeable number.

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, 91193 + ... + 106859.

It is an arithmetic number, because the mean of its divisors is an integer number (147827580).

Almost surely, 2^1551440342 is an apocalyptic number.

1551440342 is a deficient number, since it is larger than the sum of its proper divisors (813800938).

1551440342 is a wasteful number, since it uses less digits than its factorization.

1551440342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16475.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1551440342 is about 39388.3274841672. The cubic root of 1551440342 is about 1157.6528893826.

Adding to 1551440342 its reverse (2430441551), we get a palindrome (3981881893).

The spelling of 1551440342 in words is "one billion, five hundred fifty-one million, four hundred forty thousand, three hundred forty-two".