1215610151 has 8 divisors (see below), whose sum is σ = 1391518080. Its totient is φ = 1040264568.

The previous prime is 1215610117. The next prime is 1215610169. The reversal of 1215610151 is 1510165121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1215610151 - 2⁶ = 1215610087 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 (1215610171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135941 + ... + 144606.

It is an arithmetic number, because the mean of its divisors is an integer number (173939760).

Almost surely, 2^1215610151 is an apocalyptic number.

1215610151 is a deficient number, since it is larger than the sum of its proper divisors (175907929).

1215610151 is an equidigital number, since it uses as much as digits as its factorization.

1215610151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281173.

The product of its (nonzero) digits is 300, while the sum is 23.

The square root of 1215610151 is about 34865.6012568262. The cubic root of 1215610151 is about 1067.2465821966.

Adding to 1215610151 its reverse (1510165121), we get a palindrome (2725775272).

The spelling of 1215610151 in words is "one billion, two hundred fifteen million, six hundred ten thousand, one hundred fifty-one".