151215 has 16 divisors (see below), whose sum is σ = 256608. Its totient is φ = 75776.

The previous prime is 151213. The next prime is 151237. The reversal of 151215 is 512151.

It is a cyclic number.

It is not a de Polignac number, because 151215 - 2¹ = 151213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

151215 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 151194 and 151203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42 + ... + 551.

It is an arithmetic number, because the mean of its divisors is an integer number (16038).

2¹⁵¹²¹⁵ is an apocalyptic number.

151215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

151215 is a deficient number, since it is larger than the sum of its proper divisors (105393).

151215 is a wasteful number, since it uses less digits than its factorization.

151215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618.

The product of its digits is 50, while the sum is 15.

The square root of 151215 is about 388.8637293449. The cubic root of 151215 is about 53.2760017606.

Adding to 151215 its reverse (512151), we get a palindrome (663366).

It can be divided in two parts, 15 and 1215, that multiplied together give a square (18225 = 135²).

The spelling of 151215 in words is "one hundred fifty-one thousand, two hundred fifteen".