1551451340 has 24 divisors (see below), whose sum is σ = 3282923952. Its totient is φ = 615842240.

The previous prime is 1551451339. The next prime is 1551451373. The reversal of 1551451340 is 431541551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293459 + ... + 298698.

It is an arithmetic number, because the mean of its divisors is an integer number (136788498).

Almost surely, 2^1551451340 is an apocalyptic number.

1551451340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551451340 is an abundant number, since it is smaller than the sum of its proper divisors (1731472612).

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

1551451340 is a wasteful number, since it uses less digits than its factorization.

1551451340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592297 (or 592295 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 1551451340 is about 39388.4670938081. The cubic root of 1551451340 is about 1157.6556248700.

Adding to 1551451340 its reverse (431541551), we get a palindrome (1982992891).

The spelling of 1551451340 in words is "one billion, five hundred fifty-one million, four hundred fifty-one thousand, three hundred forty".