2147651 has 4 divisors (see below), whose sum is σ = 2342904. Its totient is φ = 1952400.

The previous prime is 2147641. The next prime is 2147657. The reversal of 2147651 is 1567412.

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 2147651 - 2¹⁴ = 2131267 is a prime.

It is a super-2 number, since 2×2147651² = 9224809635602, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2147651.

It is not an unprimeable number, because it can be changed into a prime (2147657) 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, 97610 + ... + 97631.

It is an arithmetic number, because the mean of its divisors is an integer number (585726).

2^2147651 is an apocalyptic number.

2147651 is a deficient number, since it is larger than the sum of its proper divisors (195253).

2147651 is a wasteful number, since it uses less digits than its factorization.

2147651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195252.

The product of its digits is 1680, while the sum is 26.

The square root of 2147651 is about 1465.4866086048. The cubic root of 2147651 is about 129.0192667976.

The spelling of 2147651 in words is "two million, one hundred forty-seven thousand, six hundred fifty-one".