47742511 has 18 divisors (see below), whose sum is σ = 53079072. Its totient is φ = 42888960.

The previous prime is 47742509. The next prime is 47742521. The reversal of 47742511 is 11524774.

It is not a de Polignac number, because 47742511 - 2¹ = 47742509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47742521) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 653971 + ... + 654043.

Almost surely, 2^47742511 is an apocalyptic number.

47742511 is a deficient number, since it is larger than the sum of its proper divisors (5336561).

47742511 is an equidigital number, since it uses as much as digits as its factorization.

47742511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 121 counting only the distinct ones).

The product of its digits is 7840, while the sum is 31.

The square root of 47742511 is about 6909.5955742721. The cubic root of 47742511 is about 362.7731078628.

Multiplying 47742511 by its sum of digits (31), we get a square (1480017841 = 38471²).

47742511 divided by its sum of digits (31) gives a square (1540081 = 1241²).

The spelling of 47742511 in words is "forty-seven million, seven hundred forty-two thousand, five hundred eleven".