1545153231 has 4 divisors (see below), whose sum is σ = 2060204312. Its totient is φ = 1030102152.

The previous prime is 1545153229. The next prime is 1545153257. The reversal of 1545153231 is 1323515451.

1545153231 is digitally balanced in base 4, 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, and also an emirpimes, since its reverse is a distinct semiprime: 1323515451 = 3 ⋅441171817.

It is not a de Polignac number, because 1545153231 - 2¹ = 1545153229 is a prime.

It is a super-2 number, since 2×1545153231² = 4774997014539478722, which contains 22 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 (1545153431) 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, 257525536 + ... + 257525541.

It is an arithmetic number, because the mean of its divisors is an integer number (515051078).

Almost surely, 2^1545153231 is an apocalyptic number.

1545153231 is a deficient number, since it is larger than the sum of its proper divisors (515051081).

1545153231 is an equidigital number, since it uses as much as digits as its factorization.

1545153231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515051080.

The product of its digits is 9000, while the sum is 30.

The square root of 1545153231 is about 39308.4371477677. The cubic root of 1545153231 is about 1156.0870012605.

Adding to 1545153231 its reverse (1323515451), we get a palindrome (2868668682).

The spelling of 1545153231 in words is "one billion, five hundred forty-five million, one hundred fifty-three thousand, two hundred thirty-one".