2157607 has 4 divisors (see below), whose sum is σ = 2251440. Its totient is φ = 2063776.

The previous prime is 2157587. The next prime is 2157641. The reversal of 2157607 is 7067512.

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 2157607 - 2¹⁵ = 2124839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157667) 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, 46882 + ... + 46927.

It is an arithmetic number, because the mean of its divisors is an integer number (562860).

2^2157607 is an apocalyptic number.

2157607 is a deficient number, since it is larger than the sum of its proper divisors (93833).

2157607 is an equidigital number, since it uses as much as digits as its factorization.

2157607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93832.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 2157607 is about 1468.8795049288. The cubic root of 2157607 is about 129.2183270752.

It can be divided in two parts, 2 and 157607, that added together give a square (157609 = 397²).

The spelling of 2157607 in words is "two million, one hundred fifty-seven thousand, six hundred seven".