48781551 has 64 divisors (see below), whose sum is σ = 88639488. Its totient is φ = 23113728.

The previous prime is 48781549. The next prime is 48781553. The reversal of 48781551 is 15518784.

It is an interprime number because it is at equal distance from previous prime (48781549) and next prime (48781553).

It is not a de Polignac number, because 48781551 - 2¹ = 48781549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48781553) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 106515 + ... + 106971.

It is an arithmetic number, because the mean of its divisors is an integer number (1384992).

Almost surely, 2^48781551 is an apocalyptic number.

48781551 is a deficient number, since it is larger than the sum of its proper divisors (39857937).

48781551 is a wasteful number, since it uses less digits than its factorization.

48781551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520.

The product of its digits is 44800, while the sum is 39.

The square root of 48781551 is about 6984.3790704686. The cubic root of 48781551 is about 365.3859706429.

The spelling of 48781551 in words is "forty-eight million, seven hundred eighty-one thousand, five hundred fifty-one".