2154679521 has 8 divisors (see below), whose sum is σ = 2965580544. Its totient is φ = 1390115760.

The previous prime is 2154679507. The next prime is 2154679523. The reversal of 2154679521 is 1259764512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2154679521 - 2⁵ = 2154679489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2154679523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11584206 + ... + 11584391.

It is an arithmetic number, because the mean of its divisors is an integer number (370697568).

Almost surely, 2^2154679521 is an apocalyptic number.

It is an amenable number.

2154679521 is a deficient number, since it is larger than the sum of its proper divisors (810901023).

2154679521 is a wasteful number, since it uses less digits than its factorization.

2154679521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23168631.

The product of its digits is 151200, while the sum is 42.

The square root of 2154679521 is about 46418.5256228588. The cubic root of 2154679521 is about 1291.5985872649.

The spelling of 2154679521 in words is "two billion, one hundred fifty-four million, six hundred seventy-nine thousand, five hundred twenty-one".