1157553471 has 4 divisors (see below), whose sum is σ = 1543404632. Its totient is φ = 771702312.

The previous prime is 1157553437. The next prime is 1157553479. The reversal of 1157553471 is 1743557511.

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

It is not a de Polignac number, because 1157553471 - 2⁷ = 1157553343 is a prime.

It is a super-3 number, since 3×1157553471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157553479) 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, 192925576 + ... + 192925581.

It is an arithmetic number, because the mean of its divisors is an integer number (385851158).

Almost surely, 2^1157553471 is an apocalyptic number.

1157553471 is a deficient number, since it is larger than the sum of its proper divisors (385851161).

1157553471 is an equidigital number, since it uses as much as digits as its factorization.

1157553471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385851160.

The product of its digits is 73500, while the sum is 39.

The square root of 1157553471 is about 34022.8374918965. The cubic root of 1157553471 is about 1049.9783732507.

The spelling of 1157553471 in words is "one billion, one hundred fifty-seven million, five hundred fifty-three thousand, four hundred seventy-one".