157435955221 has 2 divisors, whose sum is σ = 157435955222. Its totient is φ = 157435955220.

The previous prime is 157435955219. The next prime is 157435955267. The reversal of 157435955221 is 122559534751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134678724196 + 22757231025 = 366986^2 + 150855^2 .

It is a cyclic number.

It is not a de Polignac number, because 157435955221 - 2¹ = 157435955219 is a prime.

Together with 157435955219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157435955021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78717977610 + 78717977611.

It is an arithmetic number, because the mean of its divisors is an integer number (78717977611).

Almost surely, 2^157435955221 is an apocalyptic number.

It is an amenable number.

157435955221 is a deficient number, since it is larger than the sum of its proper divisors (1).

157435955221 is an equidigital number, since it uses as much as digits as its factorization.

157435955221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890000, while the sum is 49.

The spelling of 157435955221 in words is "one hundred fifty-seven billion, four hundred thirty-five million, nine hundred fifty-five thousand, two hundred twenty-one".