157572823 has 2 divisors, whose sum is σ = 157572824. Its totient is φ = 157572822.

The previous prime is 157572797. The next prime is 157572829. The reversal of 157572823 is 328275751.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (328275751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157572823 is a prime.

It is a super-3 number, since 3×157572823³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157572829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78786411 + 78786412.

It is an arithmetic number, because the mean of its divisors is an integer number (78786412).

Almost surely, 2^157572823 is an apocalyptic number.

157572823 is a deficient number, since it is larger than the sum of its proper divisors (1).

157572823 is an equidigital number, since it uses as much as digits as its factorization.

157572823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 40.

The square root of 157572823 is about 12552.8014004843. The cubic root of 157572823 is about 540.1243689306.

It can be divided in two parts, 1575728 and 23, that added together give a palindrome (1575751).

The spelling of 157572823 in words is "one hundred fifty-seven million, five hundred seventy-two thousand, eight hundred twenty-three".