151221654 has 40 divisors (see below), whose sum is σ = 346075488. Its totient is φ = 49332240.

The previous prime is 151221643. The next prime is 151221671. The reversal of 151221654 is 456122151.

151221654 is a `hidden beast` number, since 1 + 5 + 1 + 2 + 2 + 1 + 654 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2317 + ... + 17544.

Almost surely, 2^151221654 is an apocalyptic number.

151221654 is an abundant number, since it is smaller than the sum of its proper divisors (194853834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151221654 is a wasteful number, since it uses less digits than its factorization.

151221654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19922 (or 19913 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 151221654 is about 12297.2213934693. The cubic root of 151221654 is about 532.7678319391.

The spelling of 151221654 in words is "one hundred fifty-one million, two hundred twenty-one thousand, six hundred fifty-four".