2147623521 has 16 divisors (see below), whose sum is σ = 2877546240. Its totient is φ = 1424741760.

The previous prime is 2147623493. The next prime is 2147623537. The reversal of 2147623521 is 1253267412.

It is not a de Polignac number, because 2147623521 - 2⁷ = 2147623393 is a prime.

It is a super-2 number, since 2×2147623521² = 9224573575904874882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2147623571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673551 + ... + 676731.

It is an arithmetic number, because the mean of its divisors is an integer number (179846640).

Almost surely, 2^2147623521 is an apocalyptic number.

It is an amenable number.

2147623521 is a deficient number, since it is larger than the sum of its proper divisors (729922719).

2147623521 is a wasteful number, since it uses less digits than its factorization.

2147623521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216.

The product of its digits is 20160, while the sum is 33.

The square root of 2147623521 is about 46342.4591600403. The cubic root of 2147623521 is about 1290.1871653194.

The spelling of 2147623521 in words is "two billion, one hundred forty-seven million, six hundred twenty-three thousand, five hundred twenty-one".