2015133251 has 4 divisors (see below), whose sum is σ = 2015276472. Its totient is φ = 2014990032.

The previous prime is 2015133223. The next prime is 2015133277. The reversal of 2015133251 is 1523315102.

It is a happy number.

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 2015133251 - 2³⁰ = 941391427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2015133221) 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, 47885 + ... + 79518.

It is an arithmetic number, because the mean of its divisors is an integer number (503819118).

Almost surely, 2^2015133251 is an apocalyptic number.

2015133251 is a deficient number, since it is larger than the sum of its proper divisors (143221).

2015133251 is a wasteful number, since it uses less digits than its factorization.

2015133251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143220.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 2015133251 is about 44890.2355863722. The cubic root of 2015133251 is about 1263.0908519671.

Adding to 2015133251 its reverse (1523315102), we get a palindrome (3538448353).

It can be divided in two parts, 201 and 5133251, that multiplied together give a triangular number (1031783451 = T₄₅₄₂₆).

The spelling of 2015133251 in words is "two billion, fifteen million, one hundred thirty-three thousand, two hundred fifty-one".