47477531 has 4 divisors (see below), whose sum is σ = 47492592. Its totient is φ = 47462472.

The previous prime is 47477527. The next prime is 47477537. The reversal of 47477531 is 13577474.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13577474 = 2 ⋅6788737.

It is a cyclic number.

It is not a de Polignac number, because 47477531 - 2² = 47477527 is a prime.

It is a super-2 number, since 2×47477531² = 4508231899711922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47477537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 791 + ... + 9776.

It is an arithmetic number, because the mean of its divisors is an integer number (11873148).

Almost surely, 2^47477531 is an apocalyptic number.

47477531 is a deficient number, since it is larger than the sum of its proper divisors (15061).

47477531 is a wasteful number, since it uses less digits than its factorization.

47477531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15060.

The product of its digits is 82320, while the sum is 38.

The square root of 47477531 is about 6890.3941106442. The cubic root of 47477531 is about 362.1007091369.

It can be divided in two parts, 474775 and 31, that multiplied together give a triangular number (14718025 = T₅₄₂₅).

The spelling of 47477531 in words is "forty-seven million, four hundred seventy-seven thousand, five hundred thirty-one".