245245001251 has 4 divisors (see below), whose sum is σ = 248905374472. Its totient is φ = 241584628032.

The previous prime is 245245001219. The next prime is 245245001269. The reversal of 245245001251 is 152100542542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245245001251 - 2⁵ = 245245001219 is a prime.

It is a super-2 number, since 2×245245001251² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245245001291) 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, 1830186510 + ... + 1830186643.

It is an arithmetic number, because the mean of its divisors is an integer number (62226343618).

Almost surely, 2^245245001251 is an apocalyptic number.

245245001251 is a deficient number, since it is larger than the sum of its proper divisors (3660373221).

245245001251 is an equidigital number, since it uses as much as digits as its factorization.

245245001251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660373220.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 245245001251 its reverse (152100542542), we get a palindrome (397345543793).

The spelling of 245245001251 in words is "two hundred forty-five billion, two hundred forty-five million, one thousand, two hundred fifty-one".