2151513131 has 4 divisors (see below), whose sum is σ = 2172401712. Its totient is φ = 2130624552.

The previous prime is 2151513113. The next prime is 2151513167. The reversal of 2151513131 is 1313151512.

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 2151513131 - 2¹⁸ = 2151250987 is a prime.

It is a super-2 number, since 2×2151513131² = 9258017505730846322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151513097 and 2151513106.

It is not an unprimeable number, because it can be changed into a prime (2151513191) 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, 10444136 + ... + 10444341.

It is an arithmetic number, because the mean of its divisors is an integer number (543100428).

Almost surely, 2^2151513131 is an apocalyptic number.

2151513131 is a deficient number, since it is larger than the sum of its proper divisors (20888581).

2151513131 is a wasteful number, since it uses less digits than its factorization.

2151513131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20888580.

The product of its digits is 450, while the sum is 23.

The square root of 2151513131 is about 46384.4061188671. The cubic root of 2151513131 is about 1290.9655913788.

Adding to 2151513131 its reverse (1313151512), we get a palindrome (3464664643).

The spelling of 2151513131 in words is "two billion, one hundred fifty-one million, five hundred thirteen thousand, one hundred thirty-one".