151420521 has 16 divisors (see below), whose sum is σ = 231251328. Its totient is φ = 86332800.

The previous prime is 151420517. The next prime is 151420531. The reversal of 151420521 is 125024151.

151420521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 151420521 - 2² = 151420517 is a prime.

It is a super-2 number, since 2×151420521² = 45856348359822882, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (151420531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1861 + ... + 17501.

It is an arithmetic number, because the mean of its divisors is an integer number (14453208).

Almost surely, 2^151420521 is an apocalyptic number.

It is an amenable number.

151420521 is a deficient number, since it is larger than the sum of its proper divisors (79830807).

151420521 is a wasteful number, since it uses less digits than its factorization.

151420521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16112.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 151420521 is about 12305.3045878597. The cubic root of 151420521 is about 533.0012718988.

Adding to 151420521 its reverse (125024151), we get a palindrome (276444672).

The spelling of 151420521 in words is "one hundred fifty-one million, four hundred twenty thousand, five hundred twenty-one".