1551151240 has 16 divisors (see below), whose sum is σ = 3490090380. Its totient is φ = 620460480.

The previous prime is 1551151223. The next prime is 1551151243. The reversal of 1551151240 is 421511551.

It can be written as a sum of positive squares in 2 ways, for example, as 1523965444 + 27185796 = 39038^2 + 5214^2 .

It is not an unprimeable number, because it can be changed into a prime (1551151243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19389351 + ... + 19389430.

Almost surely, 2^1551151240 is an apocalyptic number.

1551151240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551151240 is an abundant number, since it is smaller than the sum of its proper divisors (1938939140).

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

1551151240 is a wasteful number, since it uses less digits than its factorization.

1551151240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38778792 (or 38778788 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1551151240 is about 39384.6574188478. The cubic root of 1551151240 is about 1157.5809775926.

Adding to 1551151240 its reverse (421511551), we get a palindrome (1972662791).

The spelling of 1551151240 in words is "one billion, five hundred fifty-one million, one hundred fifty-one thousand, two hundred forty".