2145715507 has 16 divisors (see below), whose sum is σ = 2399937120. Its totient is φ = 1905437952.

The previous prime is 2145715493. The next prime is 2145715511. The reversal of 2145715507 is 7055175412.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145715507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145715567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17748 + ... + 67870.

It is an arithmetic number, because the mean of its divisors is an integer number (149996070).

Almost surely, 2^2145715507 is an apocalyptic number.

2145715507 is a deficient number, since it is larger than the sum of its proper divisors (254221613).

2145715507 is a wasteful number, since it uses less digits than its factorization.

2145715507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50262.

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 2145715507 is about 46321.8685611882. The cubic root of 2145715507 is about 1289.8049716179.

The spelling of 2145715507 in words is "two billion, one hundred forty-five million, seven hundred fifteen thousand, five hundred seven".