2729155531 has 4 divisors (see below), whose sum is σ = 2731910464. Its totient is φ = 2726400600.

The previous prime is 2729155523. The next prime is 2729155543. The reversal of 2729155531 is 1355519272.

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 2729155531 - 2³ = 2729155523 is a prime.

It is a super-2 number, since 2×2729155531² = 14896579824775783922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2729155511) 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, 1375980 + ... + 1377961.

It is an arithmetic number, because the mean of its divisors is an integer number (682977616).

Almost surely, 2^2729155531 is an apocalyptic number.

2729155531 is a deficient number, since it is larger than the sum of its proper divisors (2754933).

2729155531 is an equidigital number, since it uses as much as digits as its factorization.

2729155531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754932.

The product of its digits is 94500, while the sum is 40.

The square root of 2729155531 is about 52241.3201498584. The cubic root of 2729155531 is about 1397.4708642452.

The spelling of 2729155531 in words is "two billion, seven hundred twenty-nine million, one hundred fifty-five thousand, five hundred thirty-one".