2157601951 has 2 divisors, whose sum is σ = 2157601952. Its totient is φ = 2157601950.

The previous prime is 2157601933. The next prime is 2157601969. The reversal of 2157601951 is 1591067512.

It is a balanced prime because it is at equal distance from previous prime (2157601933) and next prime (2157601969).

It is a cyclic number.

It is not a de Polignac number, because 2157601951 - 2¹¹ = 2157599903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2157601951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157605951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078800975 + 1078800976.

It is an arithmetic number, because the mean of its divisors is an integer number (1078800976).

Almost surely, 2^2157601951 is an apocalyptic number.

2157601951 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157601951 is an equidigital number, since it uses as much as digits as its factorization.

2157601951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 37.

The square root of 2157601951 is about 46449.9940904194. The cubic root of 2157601951 is about 1292.1822628085.

The spelling of 2157601951 in words is "two billion, one hundred fifty-seven million, six hundred one thousand, nine hundred fifty-one".