257102420541 has 4 divisors (see below), whose sum is σ = 342803227392. Its totient is φ = 171401613692.

The previous prime is 257102420483. The next prime is 257102420567. The reversal of 257102420541 is 145024201752.

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.

It is a cyclic number.

It is not a de Polignac number, because 257102420541 - 2¹⁴ = 257102404157 is a prime.

It is a super-2 number, since 2×257102420541² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257102427541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42850403421 + ... + 42850403426.

It is an arithmetic number, because the mean of its divisors is an integer number (85700806848).

Almost surely, 2^257102420541 is an apocalyptic number.

It is an amenable number.

257102420541 is a deficient number, since it is larger than the sum of its proper divisors (85700806851).

257102420541 is an equidigital number, since it uses as much as digits as its factorization.

257102420541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85700806850.

The product of its (nonzero) digits is 22400, while the sum is 33.

The spelling of 257102420541 in words is "two hundred fifty-seven billion, one hundred two million, four hundred twenty thousand, five hundred forty-one".