2157280763 has 8 divisors (see below), whose sum is σ = 2367002736. Its totient is φ = 1949826400.

The previous prime is 2157280757. The next prime is 2157280787. The reversal of 2157280763 is 3670827512.

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 2157280763 - 2⁴ = 2157280747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2157280763.

It is not an unprimeable number, because it can be changed into a prime (2157280703) 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, 564908 + ... + 568713.

It is an arithmetic number, because the mean of its divisors is an integer number (295875342).

Almost surely, 2^2157280763 is an apocalyptic number.

2157280763 is a deficient number, since it is larger than the sum of its proper divisors (209721973).

2157280763 is a wasteful number, since it uses less digits than its factorization.

2157280763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133805.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 2157280763 is about 46446.5366093103. The cubic root of 2157280763 is about 1292.1181400707.

The spelling of 2157280763 in words is "two billion, one hundred fifty-seven million, two hundred eighty thousand, seven hundred sixty-three".