1551442401 has 6 divisors (see below), whose sum is σ = 2240972370. Its totient is φ = 1034294928.

The previous prime is 1551442363. The next prime is 1551442429. The reversal of 1551442401 is 1042441551.

It can be written as a sum of positive squares in only one way, i.e., 1503500625 + 47941776 = 38775^2 + 6924^2 .

It is not a de Polignac number, because 1551442401 - 2⁹ = 1551441889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1551442601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86191236 + ... + 86191253.

It is an arithmetic number, because the mean of its divisors is an integer number (373495395).

Almost surely, 2^1551442401 is an apocalyptic number.

It is an amenable number.

1551442401 is a deficient number, since it is larger than the sum of its proper divisors (689529969).

1551442401 is a wasteful number, since it uses less digits than its factorization.

1551442401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172382495 (or 172382492 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 1551442401 is about 39388.3536213435. The cubic root of 1551442401 is about 1157.6534015102.

Adding to 1551442401 its reverse (1042441551), we get a palindrome (2593883952).

The spelling of 1551442401 in words is "one billion, five hundred fifty-one million, four hundred forty-two thousand, four hundred one".