2157158810 has 8 divisors (see below), whose sum is σ = 3882885876. Its totient is φ = 862863520.

The previous prime is 2157158743. The next prime is 2157158831. The reversal of 2157158810 is 188517512.

It can be written as a sum of positive squares in 2 ways, for example, as 1955319961 + 201838849 = 44219^2 + 14207^2 .

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

It is a super-2 number, since 2×2157158810² = 9306668263121232200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107857931 + ... + 107857950.

Almost surely, 2^2157158810 is an apocalyptic number.

2157158810 is a deficient number, since it is larger than the sum of its proper divisors (1725727066).

2157158810 is a wasteful number, since it uses less digits than its factorization.

2157158810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215715888.

The product of its (nonzero) digits is 22400, while the sum is 38.

The square root of 2157158810 is about 46445.2237587462. The cubic root of 2157158810 is about 1292.0937914160.

The spelling of 2157158810 in words is "two billion, one hundred fifty-seven million, one hundred fifty-eight thousand, eight hundred ten".