1953551401 has 2 divisors, whose sum is σ = 1953551402. Its totient is φ = 1953551400.

The previous prime is 1953551377. The next prime is 1953551417. The reversal of 1953551401 is 1041553591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1725571600 + 227979801 = 41540^2 + 15099^2 .

It is a cyclic number.

It is not a de Polignac number, because 1953551401 - 2²¹ = 1951454249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1953551461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976775700 + 976775701.

It is an arithmetic number, because the mean of its divisors is an integer number (976775701).

Almost surely, 2^1953551401 is an apocalyptic number.

It is an amenable number.

1953551401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953551401 is an equidigital number, since it uses as much as digits as its factorization.

1953551401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 34.

The square root of 1953551401 is about 44198.9977375053. The cubic root of 1953551401 is about 1250.0909589277.

The spelling of 1953551401 in words is "one billion, nine hundred fifty-three million, five hundred fifty-one thousand, four hundred one".