2172429951 has 16 divisors (see below), whose sum is σ = 2976220800. Its totient is φ = 1408498848.

The previous prime is 2172429947. The next prime is 2172429979. The reversal of 2172429951 is 1599242712.

It is not a de Polignac number, because 2172429951 - 2² = 2172429947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172429251) 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, 416880 + ... + 422058.

It is an arithmetic number, because the mean of its divisors is an integer number (186013800).

Almost surely, 2^2172429951 is an apocalyptic number.

2172429951 is a deficient number, since it is larger than the sum of its proper divisors (803790849).

2172429951 is a wasteful number, since it uses less digits than its factorization.

2172429951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8998.

The product of its digits is 90720, while the sum is 42.

The square root of 2172429951 is about 46609.3333035348. Note that the first 4 decimals coincide. The cubic root of 2172429951 is about 1295.1356577872.

The spelling of 2172429951 in words is "two billion, one hundred seventy-two million, four hundred twenty-nine thousand, nine hundred fifty-one".