1551442045 has 4 divisors (see below), whose sum is σ = 1861730460. Its totient is φ = 1241153632.

The previous prime is 1551442019. The next prime is 1551442051. The reversal of 1551442045 is 5402441551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 570875449 + 980566596 = 23893^2 + 31314^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551442045 - 2⁹ = 1551441533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1551441998 and 1551442016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155144200 + ... + 155144209.

It is an arithmetic number, because the mean of its divisors is an integer number (465432615).

Almost surely, 2^1551442045 is an apocalyptic number.

It is an amenable number.

1551442045 is a deficient number, since it is larger than the sum of its proper divisors (310288415).

1551442045 is an equidigital number, since it uses as much as digits as its factorization.

1551442045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310288414.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 1551442045 is about 39388.3491022409. The cubic root of 1551442045 is about 1157.6533129637.

Adding to 1551442045 its reverse (5402441551), we get a palindrome (6953883596).

The spelling of 1551442045 in words is "one billion, five hundred fifty-one million, four hundred forty-two thousand, forty-five".