1355120551 has 4 divisors (see below), whose sum is σ = 1377335704. Its totient is φ = 1332905400.

The previous prime is 1355120539. The next prime is 1355120579. The reversal of 1355120551 is 1550215531.

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

It is a cyclic number.

It is not a de Polignac number, because 1355120551 - 2⁷ = 1355120423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355123551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11107485 + ... + 11107606.

It is an arithmetic number, because the mean of its divisors is an integer number (344333926).

Almost surely, 2^1355120551 is an apocalyptic number.

1355120551 is a deficient number, since it is larger than the sum of its proper divisors (22215153).

1355120551 is an equidigital number, since it uses as much as digits as its factorization.

1355120551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22215152.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 1355120551 is about 36811.9620639813. The cubic root of 1355120551 is about 1106.6050400051.

The spelling of 1355120551 in words is "one billion, three hundred fifty-five million, one hundred twenty thousand, five hundred fifty-one".