2155030431 has 4 divisors (see below), whose sum is σ = 2873373912. Its totient is φ = 1436686952.

The previous prime is 2155030373. The next prime is 2155030433. The reversal of 2155030431 is 1340305512.

2155030431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2155030431 - 2¹¹ = 2155028383 is a prime.

It is a super-2 number, since 2×2155030431² = 9288312317072091522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155030433) 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, 359171736 + ... + 359171741.

It is an arithmetic number, because the mean of its divisors is an integer number (718343478).

Almost surely, 2^2155030431 is an apocalyptic number.

2155030431 is a deficient number, since it is larger than the sum of its proper divisors (718343481).

2155030431 is an equidigital number, since it uses as much as digits as its factorization.

2155030431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718343480.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 2155030431 is about 46422.3053175949. The cubic root of 2155030431 is about 1291.6686998197.

Adding to 2155030431 its reverse (1340305512), we get a palindrome (3495335943).

The spelling of 2155030431 in words is "two billion, one hundred fifty-five million, thirty thousand, four hundred thirty-one".