151610620221 has 12 divisors (see below), whose sum is σ = 218997065248. Its totient is φ = 101071925064.

The previous prime is 151610620201. The next prime is 151610620283. The reversal of 151610620221 is 122026016151.

151610620221 is a `hidden beast` number, since 1 + 5 + 1 + 6 + 10 + 620 + 2 + 21 = 666.

It is not a de Polignac number, because 151610620221 - 2⁶ = 151610620157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151610620201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 542286 + ... + 772848.

Almost surely, 2^151610620221 is an apocalyptic number.

It is an amenable number.

151610620221 is a deficient number, since it is larger than the sum of its proper divisors (67386445027).

151610620221 is a wasteful number, since it uses less digits than its factorization.

151610620221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303632 (or 303629 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 151610620221 its reverse (122026016151), we get a palindrome (273636636372).

The spelling of 151610620221 in words is "one hundred fifty-one billion, six hundred ten million, six hundred twenty thousand, two hundred twenty-one".