151155421 has 4 divisors (see below), whose sum is σ = 151833472. Its totient is φ = 150477372.

The previous prime is 151155383. The next prime is 151155437. The reversal of 151155421 is 124551151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 151155421 - 2⁹ = 151154909 is a prime.

It is a super-2 number, since 2×151155421² = 45695922595374482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151155451) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 338691 + ... + 339136.

It is an arithmetic number, because the mean of its divisors is an integer number (37958368).

Almost surely, 2^151155421 is an apocalyptic number.

It is an amenable number.

151155421 is a deficient number, since it is larger than the sum of its proper divisors (678051).

151155421 is an equidigital number, since it uses as much as digits as its factorization.

151155421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678050.

The product of its digits is 1000, while the sum is 25.

The square root of 151155421 is about 12294.5280917976. The cubic root of 151155421 is about 532.6900389250.

The spelling of 151155421 in words is "one hundred fifty-one million, one hundred fifty-five thousand, four hundred twenty-one".