525478157 has 2 divisors, whose sum is σ = 525478158. Its totient is φ = 525478156.

The previous prime is 525478153. The next prime is 525478237. The reversal of 525478157 is 751874525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 282710596 + 242767561 = 16814^2 + 15581^2 .

It is a cyclic number.

It is not a de Polignac number, because 525478157 - 2² = 525478153 is a prime.

It is a super-2 number, since 2×525478157² = 552254586968233298, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525478153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262739078 + 262739079.

It is an arithmetic number, because the mean of its divisors is an integer number (262739079).

Almost surely, 2^525478157 is an apocalyptic number.

It is an amenable number.

525478157 is a deficient number, since it is larger than the sum of its proper divisors (1).

525478157 is an equidigital number, since it uses as much as digits as its factorization.

525478157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 392000, while the sum is 44.

The square root of 525478157 is about 22923.3103412225. The cubic root of 525478157 is about 806.9591605065.

The spelling of 525478157 in words is "five hundred twenty-five million, four hundred seventy-eight thousand, one hundred fifty-seven".