2157254345 has 8 divisors (see below), whose sum is σ = 2593896000. Its totient is φ = 1722342960.

The previous prime is 2157254339. The next prime is 2157254431. The reversal of 2157254345 is 5434527512.

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

It is not a de Polignac number, because 2157254345 - 2⁴ = 2157254329 is a prime.

It is a super-3 number, since 3×2157254345³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2157254299 and 2157254308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429821 + ... + 434810.

It is an arithmetic number, because the mean of its divisors is an integer number (324237000).

Almost surely, 2^2157254345 is an apocalyptic number.

It is an amenable number.

2157254345 is a deficient number, since it is larger than the sum of its proper divisors (436641655).

2157254345 is an equidigital number, since it uses as much as digits as its factorization.

2157254345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865135.

The product of its digits is 168000, while the sum is 38.

The square root of 2157254345 is about 46446.2522169443. The cubic root of 2157254345 is about 1292.1128656349.

The spelling of 2157254345 in words is "two billion, one hundred fifty-seven million, two hundred fifty-four thousand, three hundred forty-five".