2157151754 has 4 divisors (see below), whose sum is σ = 3235727634. Its totient is φ = 1078575876.

The previous prime is 2157151753. The next prime is 2157151783. The reversal of 2157151754 is 4571517512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2085292225 + 71859529 = 45665^2 + 8477^2 .

It is not an unprimeable number, because it can be changed into a prime (2157151751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539287937 + ... + 539287940.

Almost surely, 2^2157151754 is an apocalyptic number.

2157151754 is a deficient number, since it is larger than the sum of its proper divisors (1078575880).

2157151754 is a wasteful number, since it uses less digits than its factorization.

2157151754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078575879.

The product of its digits is 49000, while the sum is 38.

The square root of 2157151754 is about 46445.1477982361. The cubic root of 2157151754 is about 1292.0923826148.

The spelling of 2157151754 in words is "two billion, one hundred fifty-seven million, one hundred fifty-one thousand, seven hundred fifty-four".