1355531473 has 4 divisors (see below), whose sum is σ = 1414467648. Its totient is φ = 1296595300.

The previous prime is 1355531461. The next prime is 1355531491. The reversal of 1355531473 is 3741355531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355531473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355531453) 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, 29468053 + ... + 29468098.

It is an arithmetic number, because the mean of its divisors is an integer number (353616912).

Almost surely, 2^1355531473 is an apocalyptic number.

It is an amenable number.

1355531473 is a deficient number, since it is larger than the sum of its proper divisors (58936175).

1355531473 is an equidigital number, since it uses as much as digits as its factorization.

1355531473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58936174.

The product of its digits is 94500, while the sum is 37.

The square root of 1355531473 is about 36817.5430060182. The cubic root of 1355531473 is about 1106.7168830437.

It can be divided in two parts, 135553 and 1473, that added together give a triangular number (137026 = T₅₂₃).

The spelling of 1355531473 in words is "one billion, three hundred fifty-five million, five hundred thirty-one thousand, four hundred seventy-three".