Search a number
-
+
1513231997 is a prime number
BaseRepresentation
bin101101000110010…
…0001011001111101
310220110102011001112
41122030201121331
511044341410442
6410053451405
752333155044
oct13214413175
93813364045
101513231997
117071a8662
12362940b65
131b1675c64
14104d8955b
158ccb0082
hex5a32167d

1513231997 has 2 divisors, whose sum is σ = 1513231998. Its totient is φ = 1513231996.

The previous prime is 1513231969. The next prime is 1513232009. The reversal of 1513231997 is 7991323151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1359323161 + 153908836 = 36869^2 + 12406^2 .

It is a cyclic number.

It is not a de Polignac number, because 1513231997 - 216 = 1513166461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1513231297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756615998 + 756615999.

It is an arithmetic number, because the mean of its divisors is an integer number (756615999).

Almost surely, 21513231997 is an apocalyptic number.

It is an amenable number.

1513231997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513231997 is an equidigital number, since it uses as much as digits as its factorization.

1513231997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51030, while the sum is 41.

The square root of 1513231997 is about 38900.2827367617. The cubic root of 1513231997 is about 1148.0703612073.

The spelling of 1513231997 in words is "one billion, five hundred thirteen million, two hundred thirty-one thousand, nine hundred ninety-seven".