155505651 has 16 divisors (see below), whose sum is σ = 240979200. Its totient is φ = 87353568.

The previous prime is 155505619. The next prime is 155505683. The reversal of 155505651 is 156505551.

It is an interprime number because it is at equal distance from previous prime (155505619) and next prime (155505683).

It is not a de Polignac number, because 155505651 - 2⁵ = 155505619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155505611) 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, 61516 + ... + 63993.

It is an arithmetic number, because the mean of its divisors is an integer number (15061200).

Almost surely, 2^155505651 is an apocalyptic number.

155505651 is a deficient number, since it is larger than the sum of its proper divisors (85473549).

155505651 is a wasteful number, since it uses less digits than its factorization.

155505651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125578.

The product of its (nonzero) digits is 18750, while the sum is 33.

The square root of 155505651 is about 12470.1904957382. The cubic root of 155505651 is about 537.7520300667.

The spelling of 155505651 in words is "one hundred fifty-five million, five hundred five thousand, six hundred fifty-one".