47021357 has 4 divisors (see below), whose sum is σ = 47035260. Its totient is φ = 47007456.

The previous prime is 47021347. The next prime is 47021363. The reversal of 47021357 is 75312074.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12752041 + 34269316 = 3571^2 + 5854^2 .

It is a cyclic number.

It is not a de Polignac number, because 47021357 - 2⁴ = 47021341 is a prime.

It is a super-2 number, since 2×47021357² = 4422016028242898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47021347) 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, 1769 + ... + 9857.

It is an arithmetic number, because the mean of its divisors is an integer number (11758815).

Almost surely, 2^47021357 is an apocalyptic number.

It is an amenable number.

47021357 is a deficient number, since it is larger than the sum of its proper divisors (13903).

47021357 is an equidigital number, since it uses as much as digits as its factorization.

47021357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13902.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 47021357 is about 6857.2120428057. The cubic root of 47021357 is about 360.9372619340.

The spelling of 47021357 in words is "forty-seven million, twenty-one thousand, three hundred fifty-seven".