531478357 has 2 divisors, whose sum is σ = 531478358. Its totient is φ = 531478356.

The previous prime is 531478349. The next prime is 531478379. The reversal of 531478357 is 753874135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314033841 + 217444516 = 17721^2 + 14746^2 .

It is a cyclic number.

It is not a de Polignac number, because 531478357 - 2³ = 531478349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531478957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265739178 + 265739179.

It is an arithmetic number, because the mean of its divisors is an integer number (265739179).

Almost surely, 2^531478357 is an apocalyptic number.

It is an amenable number.

531478357 is a deficient number, since it is larger than the sum of its proper divisors (1).

531478357 is an equidigital number, since it uses as much as digits as its factorization.

531478357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 43.

The square root of 531478357 is about 23053.8143698608. The cubic root of 531478357 is about 810.0189788776.

It can be divided in two parts, 53147 and 8357, that added together give a square (61504 = 248²).

The spelling of 531478357 in words is "five hundred thirty-one million, four hundred seventy-eight thousand, three hundred fifty-seven".