1554172057 has 2 divisors, whose sum is σ = 1554172058. Its totient is φ = 1554172056.

The previous prime is 1554172043. The next prime is 1554172093. The reversal of 1554172057 is 7502714551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1554015241 + 156816 = 39421^2 + 396^2 .

It is a cyclic number.

It is not a de Polignac number, because 1554172057 - 2²⁷ = 1419954329 is a prime.

It is a super-2 number, since 2×1554172057² = 4830901565519222498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1554172007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777086028 + 777086029.

It is an arithmetic number, because the mean of its divisors is an integer number (777086029).

Almost surely, 2^1554172057 is an apocalyptic number.

It is an amenable number.

1554172057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554172057 is an equidigital number, since it uses as much as digits as its factorization.

1554172057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 1554172057 is about 39422.9889404647. The cubic root of 1554172057 is about 1158.3319408479.

The spelling of 1554172057 in words is "one billion, five hundred fifty-four million, one hundred seventy-two thousand, fifty-seven".