201612628531 has 4 divisors (see below), whose sum is σ = 204164687200. Its totient is φ = 199060569864.

The previous prime is 201612628513. The next prime is 201612628559. The reversal of 201612628531 is 135826216102.

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

It is a cyclic number.

It is not a de Polignac number, because 201612628531 - 2⁵ = 201612628499 is a prime.

It is a super-2 number, since 2×201612628531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201612628501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276029216 + ... + 1276029373.

It is an arithmetic number, because the mean of its divisors is an integer number (51041171800).

Almost surely, 2^201612628531 is an apocalyptic number.

201612628531 is a deficient number, since it is larger than the sum of its proper divisors (2552058669).

201612628531 is an equidigital number, since it uses as much as digits as its factorization.

201612628531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552058668.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 201612628531 in words is "two hundred one billion, six hundred twelve million, six hundred twenty-eight thousand, five hundred thirty-one".