1081475551 has 4 divisors (see below), whose sum is σ = 1164665992. Its totient is φ = 998285112.

The previous prime is 1081475537. The next prime is 1081475561. The reversal of 1081475551 is 1555741801.

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 1081475551 - 2²³ = 1073086943 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 1081475551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081475531) 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, 41595201 + ... + 41595226.

It is an arithmetic number, because the mean of its divisors is an integer number (291166498).

Almost surely, 2^1081475551 is an apocalyptic number.

1081475551 is a deficient number, since it is larger than the sum of its proper divisors (83190441).

1081475551 is an equidigital number, since it uses as much as digits as its factorization.

1081475551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83190440.

The product of its (nonzero) digits is 28000, while the sum is 37.

The square root of 1081475551 is about 32885.7955810712. The cubic root of 1081475551 is about 1026.4526066173.

The spelling of 1081475551 in words is "one billion, eighty-one million, four hundred seventy-five thousand, five hundred fifty-one".