151661501 has 12 divisors (see below), whose sum is σ = 157468416. Its totient is φ = 146045280.

The previous prime is 151661491. The next prime is 151661533. The reversal of 151661501 is 105166151.

151661501 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 151661501 - 2¹⁸ = 151399357 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 (151661201) 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, 138980 + ... + 140066.

It is an arithmetic number, because the mean of its divisors is an integer number (13122368).

Almost surely, 2^151661501 is an apocalyptic number.

It is an amenable number.

151661501 is a deficient number, since it is larger than the sum of its proper divisors (5806915).

151661501 is an equidigital number, since it uses as much as digits as its factorization.

151661501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 151661501 is about 12315.0924072863. The cubic root of 151661501 is about 533.2838724531.

It can be divided in two parts, 15166150 and 1, that added together give a palindrome (15166151).

The spelling of 151661501 in words is "one hundred fifty-one million, six hundred sixty-one thousand, five hundred one".