1351999955 has 8 divisors (see below), whose sum is σ = 1628134512. Its totient is φ = 1077776928.

The previous prime is 1351999951. The next prime is 1351999997. The reversal of 1351999955 is 5599991531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1351999955 - 2² = 1351999951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1351999955.

It is not an unprimeable number, because it can be changed into a prime (1351999951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476324 + ... + 479153.

It is an arithmetic number, because the mean of its divisors is an integer number (203516814).

Almost surely, 2^1351999955 is an apocalyptic number.

1351999955 is a deficient number, since it is larger than the sum of its proper divisors (276134557).

1351999955 is an equidigital number, since it uses as much as digits as its factorization.

1351999955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955765.

The product of its digits is 2460375, while the sum is 56.

The square root of 1351999955 is about 36769.5520097811. The cubic root of 1351999955 is about 1105.7549504678.

The spelling of 1351999955 in words is "one billion, three hundred fifty-one million, nine hundred ninety-nine thousand, nine hundred fifty-five".