157211437 has 2 divisors, whose sum is σ = 157211438. Its totient is φ = 157211436.

The previous prime is 157211399. The next prime is 157211441. The reversal of 157211437 is 734112751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89000356 + 68211081 = 9434^2 + 8259^2 .

It is a cyclic number.

It is not a de Polignac number, because 157211437 - 2⁷ = 157211309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157211399 and 157211408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157211737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78605718 + 78605719.

It is an arithmetic number, because the mean of its divisors is an integer number (78605719).

Almost surely, 2^157211437 is an apocalyptic number.

It is an amenable number.

157211437 is a deficient number, since it is larger than the sum of its proper divisors (1).

157211437 is an equidigital number, since it uses as much as digits as its factorization.

157211437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 157211437 is about 12538.3985022011. The cubic root of 157211437 is about 539.7111360854.

The spelling of 157211437 in words is "one hundred fifty-seven million, two hundred eleven thousand, four hundred thirty-seven".