48615391 has 4 divisors (see below), whose sum is σ = 53034984. Its totient is φ = 44195800.

The previous prime is 48615377. The next prime is 48615403. The reversal of 48615391 is 19351684.

48615391 = 2844² + 2845² + ... + 2849².

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 48615391 - 2²⁵ = 15060959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 48615391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48615311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2209780 + ... + 2209801.

It is an arithmetic number, because the mean of its divisors is an integer number (13258746).

Almost surely, 2^48615391 is an apocalyptic number.

48615391 is a deficient number, since it is larger than the sum of its proper divisors (4419593).

48615391 is a wasteful number, since it uses less digits than its factorization.

48615391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419592.

The product of its digits is 25920, while the sum is 37.

The square root of 48615391 is about 6972.4738077672. The cubic root of 48615391 is about 364.9706387841.

The spelling of 48615391 in words is "forty-eight million, six hundred fifteen thousand, three hundred ninety-one".