2151213 has 8 divisors (see below), whose sum is σ = 2993088. Its totient is φ = 1371744.

The previous prime is 2151211. The next prime is 2151221. The reversal of 2151213 is 3121512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2151213 - 2¹ = 2151211 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2151192 and 2151201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15520 + ... + 15657.

It is an arithmetic number, because the mean of its divisors is an integer number (374136).

2^2151213 is an apocalyptic number.

2151213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2151213 is a deficient number, since it is larger than the sum of its proper divisors (841875).

2151213 is a wasteful number, since it uses less digits than its factorization.

2151213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31203.

The product of its digits is 60, while the sum is 15.

The square root of 2151213 is about 1466.7014011039. The cubic root of 2151213 is about 129.0905559704.

Adding to 2151213 its reverse (3121512), we get a palindrome (5272725).

Subtracting 2151213 from its reverse (3121512), we obtain a cube (970299 = 99³).

The spelling of 2151213 in words is "two million, one hundred fifty-one thousand, two hundred thirteen".