151351221 has 32 divisors (see below), whose sum is σ = 245092608. Its totient is φ = 81100800.

The previous prime is 151351217. The next prime is 151351223. The reversal of 151351221 is 122153151.

It is not a de Polignac number, because 151351221 - 2² = 151351217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151351223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125421 + ... + 126621.

It is an arithmetic number, because the mean of its divisors is an integer number (7659144).

Almost surely, 2^151351221 is an apocalyptic number.

It is an amenable number.

151351221 is a deficient number, since it is larger than the sum of its proper divisors (93741387).

151351221 is a wasteful number, since it uses less digits than its factorization.

151351221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581.

The product of its digits is 300, while the sum is 21.

The square root of 151351221 is about 12302.4884068224. The cubic root of 151351221 is about 532.9199473327.

The spelling of 151351221 in words is "one hundred fifty-one million, three hundred fifty-one thousand, two hundred twenty-one".