2151487 has 8 divisors (see below), whose sum is σ = 2328480. Its totient is φ = 1976160.

The previous prime is 2151473. The next prime is 2151497. The reversal of 2151487 is 7841512.

2151487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151487 is a prime.

It is a super-2 number, since 2×2151487² = 9257792622338, 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 (2151467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4437 + ... + 4897.

It is an arithmetic number, because the mean of its divisors is an integer number (291060).

2^2151487 is an apocalyptic number.

2151487 is a deficient number, since it is larger than the sum of its proper divisors (176993).

2151487 is a wasteful number, since it uses less digits than its factorization.

2151487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833.

The product of its digits is 2240, while the sum is 28.

The square root of 2151487 is about 1466.7948050085. The cubic root of 2151487 is about 129.0960364924.

Adding to 2151487 its reverse (7841512), we get a palindrome (9992999).

The spelling of 2151487 in words is "two million, one hundred fifty-one thousand, four hundred eighty-seven".