264505157 has 4 divisors (see below), whose sum is σ = 302291616. Its totient is φ = 226718700.

The previous prime is 264505127. The next prime is 264505187. The reversal of 264505157 is 751505462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751505462 = 2 ⋅375752731.

It is an interprime number because it is at equal distance from previous prime (264505127) and next prime (264505187).

It is a cyclic number.

It is not a de Polignac number, because 264505157 - 2¹⁶ = 264439621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264505127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18893219 + ... + 18893232.

It is an arithmetic number, because the mean of its divisors is an integer number (75572904).

Almost surely, 2^264505157 is an apocalyptic number.

It is an amenable number.

264505157 is a deficient number, since it is larger than the sum of its proper divisors (37786459).

264505157 is an equidigital number, since it uses as much as digits as its factorization.

264505157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37786458.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 264505157 is about 16263.6145121557. The cubic root of 264505157 is about 641.9157740912.

The spelling of 264505157 in words is "two hundred sixty-four million, five hundred five thousand, one hundred fifty-seven".