2152621957 has 8 divisors (see below), whose sum is σ = 2378344896. Its totient is φ = 1937909952.

The previous prime is 2152621951. The next prime is 2152621969. The reversal of 2152621957 is 7591262512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2152621957 - 2¹⁵ = 2152589189 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 (2152621951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2752323 + ... + 2753104.

It is an arithmetic number, because the mean of its divisors is an integer number (297293112).

Almost surely, 2^2152621957 is an apocalyptic number.

It is an amenable number.

2152621957 is a deficient number, since it is larger than the sum of its proper divisors (225722939).

2152621957 is a wasteful number, since it uses less digits than its factorization.

2152621957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5505467.

The product of its digits is 75600, while the sum is 40.

The square root of 2152621957 is about 46396.3571522593. The cubic root of 2152621957 is about 1291.1873284055.

The spelling of 2152621957 in words is "two billion, one hundred fifty-two million, six hundred twenty-one thousand, nine hundred fifty-seven".