2102157057 has 64 divisors (see below), whose sum is σ = 3811368960. Its totient is φ = 995155200.

The previous prime is 2102157041. The next prime is 2102157067. The reversal of 2102157057 is 7507512012.

It is not a de Polignac number, because 2102157057 - 2⁴ = 2102157041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2102157037) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 232807 + ... + 241667.

It is an arithmetic number, because the mean of its divisors is an integer number (59552640).

Almost surely, 2^2102157057 is an apocalyptic number.

It is an amenable number.

2102157057 is a deficient number, since it is larger than the sum of its proper divisors (1709211903).

2102157057 is a wasteful number, since it uses less digits than its factorization.

2102157057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8974.

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 2102157057 is about 45849.2863303236. The cubic root of 2102157057 is about 1281.0174724499.

Adding to 2102157057 its reverse (7507512012), we get a palindrome (9609669069).

The spelling of 2102157057 in words is "two billion, one hundred two million, one hundred fifty-seven thousand, fifty-seven".