201432857023154 has 4 divisors (see below), whose sum is σ = 302149285534734. Its totient is φ = 100716428511576.

The previous prime is 201432857023109. The next prime is 201432857023199. The reversal of 201432857023154 is 451320758234102.

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

It is an interprime number because it is at equal distance from previous prime (201432857023109) and next prime (201432857023199).

It can be written as a sum of positive squares in only one way, i.e., 147755621097529 + 53677235925625 = 12155477^2 + 7326475^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201432857023099 and 201432857023108.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50358214255787 + ... + 50358214255790.

Almost surely, 2^{201432857023154} is an apocalyptic number.

201432857023154 is a deficient number, since it is larger than the sum of its proper divisors (100716428511580).

201432857023154 is a wasteful number, since it uses less digits than its factorization.

201432857023154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100716428511579.

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 201432857023154 in words is "two hundred one trillion, four hundred thirty-two billion, eight hundred fifty-seven million, twenty-three thousand, one hundred fifty-four".