201601500146 has 4 divisors (see below), whose sum is σ = 302402250222. Its totient is φ = 100800750072.

The previous prime is 201601500137. The next prime is 201601500211. The reversal of 201601500146 is 641005106102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641005106102 = 2 ⋅320502553051.

It can be written as a sum of positive squares in only one way, i.e., 110692617025 + 90908883121 = 332705^2 + 301511^2 .

It is a super-2 number, since 2×201601500146² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50400375035 + ... + 50400375038.

Almost surely, 2^201601500146 is an apocalyptic number.

201601500146 is a deficient number, since it is larger than the sum of its proper divisors (100800750076).

201601500146 is a wasteful number, since it uses less digits than its factorization.

201601500146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100800750075.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 201601500146 its reverse (641005106102), we get a palindrome (842606606248).

The spelling of 201601500146 in words is "two hundred one billion, six hundred one million, five hundred thousand, one hundred forty-six".