2152991757 has 32 divisors (see below), whose sum is σ = 3413377024. Its totient is φ = 1181174400.

The previous prime is 2152991719. The next prime is 2152991761. The reversal of 2152991757 is 7571992512.

It is a happy number.

It is not a de Polignac number, because 2152991757 - 2⁶ = 2152991693 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 (2152991777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69657 + ... + 95697.

It is an arithmetic number, because the mean of its divisors is an integer number (106668032).

Almost surely, 2^2152991757 is an apocalyptic number.

It is an amenable number.

2152991757 is a deficient number, since it is larger than the sum of its proper divisors (1260385267).

2152991757 is a wasteful number, since it uses less digits than its factorization.

2152991757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26209.

The product of its digits is 396900, while the sum is 48.

The square root of 2152991757 is about 46400.3422077898. The cubic root of 2152991757 is about 1291.2612620770.

The spelling of 2152991757 in words is "two billion, one hundred fifty-two million, nine hundred ninety-one thousand, seven hundred fifty-seven".